Day N4 - 10 - Grammar Practice

Complementary Exercises: Daily N4 - Day 10

After reading the lesson text, practice the grammar points introduced in Day N4-10.

These exercises focus on recognizing mistakes, choosing correct patterns, and producing your own sentences.
They are divided into three study sessions. Each session focuses on a different way of practicing the grammar learned in the shadowing lesson.

Grammar practiced:
✓ V[dictionary form]ใ“ใจใซใ—ใพใ™
✓ V[dictionary form]ใ“ใจใซใชใ‚Šใพใ™
✓ V[ใฆ-form]ใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹
✓ V[ใฆ-form]ใใ‚Œใพใ›ใ‚“ใ‹

1. Understand

Goal: Recognize and understand how the grammar is used.
Focus on identifying correct patterns and noticing common mistakes.

๐Ÿ” Find the Error

Identify the sentence that contains a grammar mistake or unnatural usage.
Goal: Train your ability to notice incorrect grammar patterns and avoid common mistakes.

1: Which sentence is grammatically incorrect?

Choices
A: ไปŠๆ—ฅใฏใฉใ“ใธใ‚‚ๅ‡บใ‹ใ‘ใชใ„ใ“ใจใซใ—ใพใ™。
B: ๆฅๆœˆใ‹ใ‚‰่ปŠใง้€šใ†ใ“ใจใซใ—ใพใ™。
C: ใ‚‚ใ†็”˜ใ„ใ‚‚ใฎใ‚’้ฃŸในใชใ„ใ“ใจใซใ—ใพใ™。
D: ๅฎฟ้กŒใ‚’ใ—ใฆใ“ใจใซใ—ใพใ—ใŸ。
Answer
D
Correct Sentence: ๅฎฟ้กŒใ‚’ใ™ใ‚‹ใ“ใจใซใ—ใพใ—ใŸ。
Explanation: The grammar pattern 〜ใ“ใจใซใ™ใ‚‹ (to decide to do something) strictly requires the preceding verb to be in its plain dictionary form or negative nai-form because the word koto is a nominalizer that turns the action into a noun phrase.

2: Which sentence is grammatically incorrect?

Choices
A: ๆฅ้€ฑ、ๅ‹้”ใŒๅฎถใซๆฅใ‚‹ใ“ใจใซใชใ‚Šใพใ—ใŸ。
B: ใ“ใฎๅบ—ใง้ฃŸๆ–™ๅ“ใ‚’่ฒทใ†ใ“ใจใซใชใ‚Šใพใ—ใŸ。
C: ๆ˜Žๆ—ฅใฏๅ‡บใ‹ใ‘ใพใ›ใ‚“ใ“ใจใซใชใ‚Šใพใ—ใŸ。
D: ไปŠๅนดใฎๆญฃๆœˆใฏ็”ฐ่ˆŽใธๅธฐใ‚‹ใ“ใจใซใชใ‚Šใพใ—ใŸ。
Answer
C
Correct Sentence: ๆ˜Žๆ—ฅใฏๅ‡บใ‹ใ‘ใชใ„ใ“ใจใซใชใ‚Šใพใ—ใŸ。
Explanation: The grammar pattern 〜ใ“ใจใซใชใ‚‹, which indicates that a schedule, rule, or decision has been arranged, requires the preceding verb to be in its plain dictionary form or plain negative nai-form.

3: Which sentence is grammatically incorrect?

Choices
A: ๆ˜Žๆ—ฅ、ๅญฆๆ กใซๆฅใฆใใ‚Œใพใ›ใ‚“ใ‹。
B: ใกใ‚‡ใฃใจ、ใ“ใ“ใงๅพ…ใกใใ‚Œใพใ›ใ‚“ใ‹。
C: ใ“ใฎ่ท็‰ฉใ‚’้‹ใ‚“ใงใใ‚Œใพใ›ใ‚“ใ‹。
D: ๆ‰‹ไผใฃใฆใใ‚Œใพใ›ใ‚“ใ‹。
Answer
B
Correct Sentence: ใกใ‚‡ใฃใจ、ใ“ใ“ใงๅพ…ใฃใฆใใ‚Œใพใ›ใ‚“ใ‹。
Explanation: The request pattern 〜ใฆใใ‚Œใพใ›ใ‚“ใ‹ (won't you please do something for me?) strictly requires the preceding verb to be conjugated into its te-form so that it can grammatically link to the auxiliary verb kuremasu.

4: Which sentence is grammatically incorrect?

Choices
A: ไปŠๅบฆใฎไผ‘ใฟใซ、ๅ‹้”ใจๆ˜ ็”ปใ‚’่ฆ‹ใ‚‹ใ“ใจใซใ—ใพใ—ใŸ。
B: ใ‚‚ใ†้…ใ„ใฎใง、ไปŠๆ—ฅใฏๅธฐใ‚‰ใชใ„ใ“ใจใซใ—ใพใ™。
C: ใ“ใฎๅฐ่ชฌใ‚’่ชญใ‚“ใง、ๅ‹้”ใซ่ฉฑใ™ใ“ใจใซใ—ใพใ™。
D: ๆ˜Žๆ—ฅ、ๅคงๅญฆใธ่กŒใใ“ใจใธใ—ใพใ™。
Answer
D
Correct Sentence: ๆ˜Žๆ—ฅ、ๅคงๅญฆใธ่กŒใใ“ใจใซใ—ใพใ™。
Explanation: The expression 〜ใ“ใจใซใ™ใ‚‹ (to decide on doing something) is a fixed grammatical pattern that strictly uses the target particle ni to mark the decision, indicating a transition into a specific state or choice.

✅ Choice

Choose the best option to complete the sentence.
Goal: Practice selecting the correct grammar form according to the context.

1: ใพใ ใ‚ใ‹ใ‚Šใพใ›ใ‚“ใŒ、ใŸใถใ‚“็งใฏๆฅๆœˆใ‹ใ‚‰ๅคง้˜ชใงๅƒใ(    )。

Choices
A: ใ“ใจใซใชใ‚Šใพใ›ใ‚“ใ‹
B: ใ“ใจใซใชใ‚Šใพใ™
C: ใ“ใจใซใ—ใพใ™
D: ใ“ใจใซใ—ใพใ›ใ‚“ใ‹
Answer
B
Explanation: While both 〜ใ“ใจใซใ™ใ‚‹ (personal choice) and 〜ใ“ใจใซใชใ‚‹ (external decision or arrangement) express a outcome/decision, the introductory clause ใพใ ใ‚ใ‹ใ‚Šใพใ›ใ‚“ใŒ ("I'm not sure yet, but...") indicates that the workplace assignment is dependent on external factors—such as an official company transfer or schedule—rather than a direct personal preference, making the passive structure of 〜ใ“ใจใซใชใ‚‹ the only naturally cohesive grammar pattern here.

2: ใ“ใฎ้›ป่ปŠใซไน—ใ‚‹ใจ、็ฉบๆธฏใธ่กŒใ(    )。

Choices
A: ใ“ใจใซใ—ใพใ›ใ‚“ใ‹
B: ใ“ใจใซใชใ‚Šใพใ›ใ‚“ใ‹
C: ใ“ใจใซใชใ‚Šใพใ™
D: ใ“ใจใซใ—ใพใ™
Answer
C
Explanation: The conditional structure 〜ใจ expresses an automatic consequence or natural result, indicating that taking this train inevitably leads to reaching the airport regardless of personal intention, which strictly requires 〜ใ“ใจใซใชใ‚‹ to describe an established fact or natural outcome rather than 〜ใ“ใจใซใ™ใ‚‹ (personal choice or intention).

3: A: ๆ˜Žๆ—ฅใฎใƒ‘ใƒผใƒ†ใ‚ฃใƒผ、่กŒใ? B: ใ†ใ‚“、็งใฏ้ข็™ฝใใ†ใ ใ‹ใ‚‰、่กŒใ(    )。

Choices
A: ใ“ใจใซใชใ‚‹
B: ใ“ใจใซใ™ใ‚‹
C: ใ“ใจใซใ™ใ‚‹ใ‹
D: ใ“ใจใซใชใ‚‰ใชใ„ใ‹
Answer
B
Explanation: The expression 〜ใ“ใจใซใ™ใ‚‹ denotes a deliberate personal decision or voluntary choice, perfectly aligning with the speaker's self-motivated reason (้ข็™ฝใใ†ใ ใ‹ใ‚‰) for attending the party, whereas 〜ใ“ใจใซใชใ‚‹ implies an external arrangement made by someone else or a circumstantial event outside the speaker's control.

4: ใ“ใ“ใซๅๅ‰ใ‚’ๆ›ธใใจ、ๅ‚ๅŠ ใ‚’็”ณใ—่พผใ‚€(    )。

Choices
A: ใ“ใจใซใชใ‚Šใพใ›ใ‚“ใ‹
B: ใ“ใจใซใชใ‚Šใพใ™
C: ใ“ใจใซใ—ใพใ™
D: ใ“ใจใซใ—ใพใ›ใ‚“ใ‹
Answer
B
Explanation: The conditional 〜ใจ describes an automatic rule or procedural result—stipulating that writing your name here automatically counts as signing up—which strictly requires 〜ใ“ใจใซใชใ‚‹ to represent an established system outcome rather than 〜ใ“ใจใซใ™ใ‚‹ (a deliberate personal choice).

✏️ Correct

Find and fix the grammar mistake in the sentence.
Goal: Practice applying grammar rules and producing accurate Japanese sentences.

1: ๆฅๆœˆ、ๆ–ฐใ—ใ„ไบ‹ๅ‹™ๆ‰€ใธๅผ•ใฃ่ถŠใ—ใพใ™ใ“ใจใซใชใ‚Šใพใ—ใŸ。

Answer
ๆฅๆœˆ、ๆ–ฐใ—ใ„ไบ‹ๅ‹™ๆ‰€ใธๅผ•ใฃ่ถŠใ™ใ“ใจใซใชใ‚Šใพใ—ใŸ。
Explanation: When using the expression 〜ใ“ใจใซใชใ‚Šใพใ—ใŸ to state a decision or arrangement made by an organization or external party, the verb directly preceding it must be in the dictionary form (plain/informal present tense), not the polite 〜ใพใ™ form.

2: ๆฏŽๆœ、ๆ—ฉใ่ตทใใพใ™ใ“ใจใซใ—ใพใ™。

Answer
ๆฏŽๆœ、ๆ—ฉใ่ตทใใ‚‹ใ“ใจใซใ—ใพใ™。
Explanation: The structure 〜ใ“ใจใซใ—ใพใ™ expresses a personal decision or habit, and like similar grammatical markers built with the nominalizer ใ“ใจ, it must be directly preceded by a verb in its dictionary (plain) form rather than the polite 〜ใพใ™ form.

3: ๆ˜Žๆ—ฅ、ๅญฆๆ กใฏ3ๆ™‚ใซๅง‹ใพใ‚Šใพใ™ใ“ใจใซใชใ‚Šใพใ—ใŸ。

Answer
ๆ˜Žๆ—ฅ、ๅญฆๆ กใฏ3ๆ™‚ใซๅง‹ใพใ‚‹ใ“ใจใซใชใ‚Šใพใ—ใŸ。
Explanation: Similar to 〜ใ“ใจใซใ—ใพใ™, the pattern 〜ใ“ใจใซใชใ‚Šใพใ—ใŸ indicates a decision or schedule established by an authority or official group and strictly requires a verb in its dictionary (plain) form before ใ“ใจ.

2. Practice

Goal: Practice using the grammar in different situations.
Apply the grammar by correcting, transforming, and creating sentences.

๐Ÿ” Find the Error

Identify the sentence that contains a grammar mistake or unnatural usage.
Goal: Train your ability to notice incorrect grammar patterns and avoid common mistakes.

1: Which sentence is grammatically incorrect?

Choices
A: ็”ฐไธญใ•ใ‚“、ๆ‰‹ไผใฃใฆใใ‚Œใพใ›ใ‚“ใ‹。
B: ้ง…ใธ่กŒใ้“ใ‚’ๆ•™ใˆใฆใใ‚Œใพใ›ใ‚“ใ‹。
C: ใ™ใฟใพใ›ใ‚“、ใ“ใฎๆผขๅญ—ใฎ่ชญใฟๆ–นใ‚’ๆ•™ใˆใพใ™ใใ‚Œใพใ›ใ‚“ใ‹。
D: ใ“ใฎ็ฎฑใ‚’ๆŒใฃใฆใใ‚Œใพใ›ใ‚“ใ‹。
Answer
C
Correct Sentence: ใ™ใฟใพใ›ใ‚“、ใ“ใฎๆผขๅญ—ใฎ่ชญใฟๆ–นใ‚’ๆ•™ใˆใฆใใ‚Œใพใ›ใ‚“ใ‹。
Explanation: When asking someone to do something for you using ~ใฆใใ‚Œใพใ›ใ‚“ใ‹ (won't you please... / could you please...), the main verb must always be in its -te form (te-form).

2: Which sentence is grammatically incorrect?

Choices
A: ใ“ใฎ่ท็‰ฉใ‚’้‹ใ‚“ใงใใ‚Œใพใ›ใ‚“ใ‹。
B: ใ™ใฟใพใ›ใ‚“、็ช“ใ‚’้–‹ใ‘ใ‚‹ใใ‚Œใพใ›ใ‚“ใ‹。
C: ๆ˜Žๆ—ฅ、ใ‚‚ใ†ไธ€ๅบฆๆฅใฆใใ‚Œใพใ›ใ‚“ใ‹。
D: ใกใ‚‡ใฃใจๅพ…ใฃใฆใใ‚Œใพใ›ใ‚“ใ‹。
Answer
B
Correct Sentence: ใ™ใฟใพใ›ใ‚“、็ช“ใ‚’้–‹ใ‘ใฆใใ‚Œใพใ›ใ‚“ใ‹。
Explanation: When asking someone to do something for you using ~ใฆใใ‚Œใพใ›ใ‚“ใ‹ (won't you please... / could you please...), the main verb must always be in its -te form (te-form).

3: Which sentence is grammatically incorrect?

Choices
A: ไป•ไบ‹ใ‚’่พžใ‚ใฆ、็ฟป่จณใฎๅ‹‰ๅผทใ‚’ๅง‹ใ‚ใ‚‹ใ“ใจใซใ—ใพใ—ใŸ。
B: ๅคงๅญฆ้™ขใซ้€ฒใ‚€ใ‹ใฉใ†ใ‹、ไธก่ฆชใจ็›ธ่ซ‡ใ—ใฆๆฑบใ‚ใ‚‹ใ“ใจใซใ—ใพใ™。
C: ใ“ใ‚Œใ‹ใ‚‰ๆฏŽๆ—ฅ、ๆ—ฅๆœฌ่ชžใฎๅฐ่ชฌใ‚’่ชญใ‚€ใ“ใจใซใ—ใพใ™。
D: ๆฅๆœˆ、ๅŒ—ๆตท้“ใธๆ—…่กŒใ™ใ‚‹ใซใ—ใพใ—ใŸ。
Answer
D
Correct Sentence: ๆฅๆœˆ、ๅŒ—ๆตท้“ใธๆ—…่กŒใ™ใ‚‹ใ“ใจใซใ—ใพใ—ใŸ。
Explanation: To express a personal decision or resolution using ~ใ“ใจใซใ™ใ‚‹ (to decide to do something), a verb in its dictionary (plain) form must be followed by ใ“ใจ to nominalize it before adding me ใซใ—ใพใ—ใŸ.

4: Which sentence is grammatically incorrect?

Choices
A: ใ“ใฎ็ฎฑใ‚’้–‹ใ‘ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。
B: ้ง…ใธ่กŒใ้“ใ‚’ๆ•™ใˆใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。
C: ใ™ใฟใพใ›ใ‚“、ใ“ใ“ใงๅพ…ใกใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。
D: ๆ˜Žๆ—ฅ、ใ‚‚ใ†ไธ€ๅบฆๆฅใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。
Answer
C
Correct Sentence: ใ™ใฟใพใ›ใ‚“、ใ“ใ“ใงๅพ…ใฃใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。
Explanation: Making a polite request with ~ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹ requires attaching ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹ directly to the -te form of the verb.

5: Which sentence is grammatically incorrect?

Choices
A: ๆฏŽๆœ、้‹ๅ‹•ใŒใ™ใ‚‹ใ“ใจใซใ—ใพใ™。
B: ใŠ้‡‘ใŒใ‚ใพใ‚Šใชใ„ใฎใง、ๅค–ใง้ฃŸไบ‹ใ‚’ใ—ใชใ„ใ“ใจใซใ—ใพใ™。
C: ไปŠๆ—ฅใฏๆ—ฉใๅธฐใ‚‹ใ“ใจใซใ—ใพใ™。
D: ๆฅๅนด、ๆ—ฅๆœฌใธ็•™ๅญฆใ™ใ‚‹ใ“ใจใซใ—ใพใ—ใŸ。
Answer
A
Correct Sentence: ๆฏŽๆœ、้‹ๅ‹•ใ‚’ใ™ใ‚‹ใ“ใจใซใ—ใพใ™。
Explanation: Option A incorrectly replaces the direct object particle ใ‚’ with ใŒ, breaking standard verb complementation and making the phrase ungrammatical.

✏️ Correct

Find and fix the grammar mistake in the sentence.
Goal: Practice applying grammar rules and producing accurate Japanese sentences.

1: ๅญฆๆ กใŒ็ต‚ใ‚ใฃใŸใ‚‰、็š†ใง้ฃŸไบ‹ใ—ใพใ™ใ“ใจใซใ—ใพใ™。

Answer
ๅญฆๆ กใŒ็ต‚ใ‚ใฃใŸใ‚‰、็š†ใง้ฃŸไบ‹ใ™ใ‚‹ใ“ใจใซใ—ใพใ™。
Explanation: The expression 〜ใ“ใจใซใ—ใพใ™ is used to declare a personal decision or plan, and it strictly requires the preceding verb to be in its plain dictionary form rather than the polite 〜ใพใ™ form.

2: ใŠ้ก˜ใ„ใŒใ‚ใ‚‹ใ‚“ใงใ™ใŒ、ใกใ‚‡ใฃใจๆ‰‹ไผใ†ใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。

Answer
ใŠ้ก˜ใ„ใŒใ‚ใ‚‹ใ‚“ใงใ™ใŒ、ใกใ‚‡ใฃใจๆ‰‹ไผใฃใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。
Explanation: To combine a verb with the auxiliary request pattern 〜ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹ ("Could you please do... for me?"), the preceding verb must be conjugated into its ใฆ-form, not its dictionary form.

3: ใ“ใฎ่ท็‰ฉใ‚’้‹ใถใใ‚Œใพใ›ใ‚“ใ‹。

Answer
ใ“ใฎ่ท็‰ฉใ‚’้‹ใ‚“ใงใใ‚Œใพใ›ใ‚“ใ‹。
Explanation: When asking someone to perform a favor using the polite request pattern 〜ใใ‚Œใพใ›ใ‚“ใ‹, the preceding verb must be conjugated into its ใฆ-form rather than attached as a stem.

4: ๆฅๅนด、ๅคงๅญฆ้™ขใซๅ…ฅใ‚Šใพใ™ใ“ใจใซใ—ใพใ™。

Answer
ๆฅๅนด、ๅคงๅญฆ้™ขใซๅ…ฅใ‚‹ใ“ใจใซใ—ใพใ™。
Explanation: The expression 〜ใ“ใจใซใ—ใพใ™ is used to declare a personal decision or plan, and it strictly requires the preceding verb to be in its plain dictionary form rather than the polite 〜ใพใ™ form.

5: ่ฒทใ„็‰ฉใซไป˜ใๅˆใ†ใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。

Answer
่ฒทใ„็‰ฉใซไป˜ใๅˆใฃใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。
Explanation: When using the polite request pattern 〜ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹ ("Could you please do... for me?"), the preceding verb must be in its ใฆ-form to properly link the action to the auxiliary verb.

✏️ Rewrite

Rewrite the sentence using the given grammar pattern.
Goal: Practice expressing the same idea using different grammar structures.

1: ้ง…ใพใงใฎ้“ใ‚’ๆ•™ใˆใฆใใ ใ•ใ„。

Rewrite the sentence using: ~ใฆใใ‚Œใพใ›ใ‚“ใ‹
Answer
้ง…ใพใงใฎ้“ใ‚’ๆ•™ใˆใฆใใ‚Œใพใ›ใ‚“ใ‹。
Explanation: While both requests mean "Please tell me the way to the station," ๆ•™ใˆใฆใใ‚Œใพใ›ใ‚“ใ‹ (oshiete kuremasen ka) softens the tone compared to the original ๆ•™ใˆใฆใใ ใ•ใ„ (oshiete kudasai) by phrasing the request as a negative question ("Won't you tell me?"), making it a more polite and consideration-focused way to ask someone for a favor in everyday interactions.

2: ๆฅๆœˆใ‹ใ‚‰่‡ชๅˆ†ใงๆ–™็†ใ‚’ไฝœใ‚Šใพใ™。

Rewrite the sentence using: ~ใ“ใจใซใ—ใพใ™
Answer
ๆฅๆœˆใ‹ใ‚‰่‡ชๅˆ†ใงๆ–™็†ใ‚’ไฝœใ‚‹ใ“ใจใซใ—ใพใ™。
Explanation: While the original sentence ไฝœใ‚Šใพใ™ (tsukurimasu) is a simple statement of future action ("I will cook"), adding 〜ใ“ใจใซใ—ใพใ™ (~koto ni shimasu) emphasizes a personal choice or conscious decision made by the speaker ("I have decided to cook"), adding a strong nuance of personal determination to the commitment.

3: ๆ˜Žๆ—ฅ、้›ป่ฉฑใ‚’ใ‹ใ‘ใฆใใ ใ•ใ„。

Rewrite the sentence using: ~ใฆใใ‚Œใพใ›ใ‚“ใ‹
Answer
ๆ˜Žๆ—ฅ、้›ป่ฉฑใ‚’ใ‹ใ‘ใฆใใ‚Œใพใ›ใ‚“ใ‹。
Explanation: While the original ้›ป่ฉฑใ‚’ใ‹ใ‘ใฆใใ ใ•ใ„ (denwa o kakete kudasai) is a direct instruction ("Please call me"), changing it to 〜ใฆใใ‚Œใพใ›ใ‚“ใ‹ (~te kuremasen ka) turns it into a gentle request ("Won't you give me a call?"), making the statement feel significantly less pushy and more considerate toward the listener.

4: ้ฃŸใน็‰ฉใ‚’่ฒทใฃใฆใใ ใ•ใ„。

Rewrite the sentence using: ~ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹
Answer
้ฃŸใน็‰ฉใ‚’่ฒทใฃใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。
Explanation: By switching from the direct request ่ฒทใฃใฆใใ ใ•ใ„ (katte kudasai, "Please buy food") to 〜ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹ (~te moraemasen ka), the sentence shifts to a polite potential question ("Could I receive the favor of you buying food?"), which shows greater respect by explicitly asking for the listener's willingness rather than issuing a straight instruction.

5: ใกใ‚‡ใฃใจๆ‰‹ไผใฃใฆใใ ใ•ใ„。

Rewrite the sentence using: ~ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹
Answer
ใกใ‚‡ใฃใจๆ‰‹ไผใฃใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。
Explanation: Replacing the direct command-like tone of ๆ‰‹ไผใฃใฆใใ ใ•ใ„ (tetsudatte kudasai, "Please help me a bit") with 〜ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹ (~te moraemasen ka) softens the request by asking about the listener's ability and willingness ("Could you possibly give me a hand?"), making it a much more considerate and polite way to ask for assistance.

3. Review

Goal: Review and reinforce the grammar you learned.
Combine different exercise types to check your understanding and build confidence.

๐Ÿ” Find the Error

Identify the sentence that contains a grammar mistake or unnatural usage.
Goal: Train your ability to notice incorrect grammar patterns and avoid common mistakes.

1: Which sentence is grammatically incorrect?

Choices
A: ใ™ใฟใพใ›ใ‚“、ใ“ใ“ใซๅๅ‰ใŒๆ›ธใ„ใฆใใ‚Œใพใ›ใ‚“ใ‹。
B: ใ“ใฎไฝœๆ–‡ใ‚’็›ดใ—ใฆใใ‚Œใพใ›ใ‚“ใ‹。
C: ใƒ‰ใ‚ขใ‚’้–‰ใ‚ใฆใใ‚Œใพใ›ใ‚“ใ‹。
D: ๅ†™็œŸใ‚’ๆ’ฎใฃใฆใใ‚Œใพใ›ใ‚“ใ‹。
Answer
A
Correct Sentence: ใ™ใฟใพใ›ใ‚“、ใ“ใ“ใซๅๅ‰ใ‚’ๆ›ธใ„ใฆใใ‚Œใพใ›ใ‚“ใ‹。
Explanation: Option A incorrectly uses the subject particle ใŒ instead of ใ‚’ with the transitive verb, breaking standard verb complementation and making the sentence ungrammatical.

2: Which sentence is grammatically incorrect?

Choices
A: ใƒ‰ใ‚ขใ‚’้–‹ใ‘ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。
B: ้ƒฝๅˆใŒๆ‚ชใ„ใฎใง、ๆ˜Žๆ—ฅใซใ—ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。
C: ใ“ใฎๆ‰‹็ด™ใ‚’่ชญใ‚“ใงใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。
D: ใ™ใฟใพใ›ใ‚“、ใƒšใƒณใŒ่ฒธใ—ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。
Answer
D
Correct Sentence: ใ™ใฟใพใ›ใ‚“、ใƒšใƒณใ‚’่ฒธใ—ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。
Explanation: Option D incorrectly uses the subject particle ใŒ with the transitive verb instead of ใ‚’.

3: Which sentence is grammatically incorrect?

Choices
A: ้ง…ใธ่กŒใ้“ใ‚’ๆ•™ใˆใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。
B: ใ“ใฎ็ฎฑใ‚’้–‹ใ‘ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。
C: ใ™ใฟใพใ›ใ‚“、ใ“ใฎๆผขๅญ—ใฎ่ชญใฟๆ–นใ‚’ๆ•™ใˆใพใ™ใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。
D: ใ“ใฎๆ‰‹็ด™ใ‚’่ชญใ‚“ใงใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。
Answer
C
Correct Sentence: ใ™ใฟใพใ›ใ‚“、ใ“ใฎๆผขๅญ—ใฎ่ชญใฟๆ–นใ‚’ๆ•™ใˆใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。
Explanation: Requesting a favor using ~ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹ requires attaching ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹ directly to the -te form of the verb to express a polite request.

4: Which sentence is grammatically incorrect?

Choices
A: ้ง…ใพใง้€ใฃใฆใใ‚Œใพใ›ใ‚“ใ‹。
B: ใ™ใฟใพใ›ใ‚“、็ช“ใ‚’้–‹ใ‘ใชใ„ใใ‚Œใพใ›ใ‚“ใ‹。
C: ใ“ใฎๆ‰‹็ด™ใ‚’่ชญใ‚“ใงใใ‚Œใพใ›ใ‚“ใ‹。
D: ๆ˜Žๆ—ฅ、ใ‚‚ใ†ไธ€ๅบฆ้›ป่ฉฑใ—ใฆใใ‚Œใพใ›ใ‚“ใ‹。
Answer
B
Correct Sentence: ใ™ใฟใพใ›ใ‚“、็ช“ใ‚’้–‹ใ‘ใชใ„ใงใใ‚Œใพใ›ใ‚“ใ‹。
Explanation: To politely ask someone not to do something using ~ใใ‚Œใพใ›ใ‚“ใ‹, you must attach ใใ‚Œใพใ›ใ‚“ใ‹ to the -nai de form (~ใชใ„ใง) of the verb rather than the plain negative form alone.

✅ Choice

Choose the best option to complete the sentence.
Goal: Practice selecting the correct grammar form according to the context.

1: ๅ…ˆ่ผฉ、ใŠๅฟ™ใ—ใ„ใจใ“ใ‚ใ™ใฟใพใ›ใ‚“ใŒ、ใ“ใฎ็ฟป่จณใ‚’่ฆ‹ใฆ(    )。

Choices
A: ใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹
B: ใ‚‚ใ‚‰ใ„ใพใ›ใ‚“ใ‹
C: ใใ‚Œใพใ›ใ‚“ใ‹
D: ใใ‚Œใพใ™
Answer
A
Explanation: When asking a senior colleague or superior (ๅ…ˆ่ผฉ) for a favor in a polite context, using the negative potential form 〜ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹ provides an appropriately respectful and indirect request ("could you please do me the favor of looking at this?"), whereas 〜ใใ‚Œใพใ›ใ‚“ใ‹ sounds too direct and familiar for addressing someone higher in hierarchy.

2: A: ๅคงๅญฆ้™ข、่กŒใ? B: ใ‚ˆใ—、็งใฏใ‚„ใฃใฑใ‚Š่กŒใ(    )。

Choices
A: ใ“ใจใซใ—ใชใ„
B: ใ“ใจใซใชใ‚‹
C: ใ“ใจใซใชใ‚‰ใชใ„
D: ใ“ใจใซใ™ใ‚‹
Answer
D
Explanation: The discourse markers ใ‚ˆใ— ("Alright!") and ใ‚„ใฃใฑใ‚Š ("after all") explicitly signal a firm personal resolution reached after prior deliberation, requiring the active structure 〜ใ“ใจใซใ™ใ‚‹ to express a voluntary choice rather than 〜ใ“ใจใซใชใ‚‹ (a decision determined by outside forces or arrangements).

3: ็งใฏใŠ้‡‘ใ‚’ไฝฟใ„ใ™ใŽใŸใฎใง、ใ“ใ‚Œใ‹ใ‚‰ใฏ่ฒทใ„็‰ฉใ‚’ๆธ›ใ‚‰ใ™(    )。

Choices
A: ใ“ใจใซใชใ‚Šใพใ™
B: ใ“ใจใซใ—ใพใ™
C: ใ“ใจใซใชใ‚Šใพใ›ใ‚“ใ‹
D: ใ“ใจใซใ—ใพใ›ใ‚“ใ‹
Answer
B
Explanation: The speaker's self-reflection on overspending leads directly to a conscious personal resolution to cut back on shopping, which requires the voluntary grammar structure 〜ใ“ใจใซใ™ใ‚‹ to express a deliberate self-imposed choice rather than 〜ใ“ใจใซใชใ‚‹ (an external requirement or automatic arrangement).

4: ใ‚ˆใ—、็งใฏไปŠๆ—ฅใ‹ใ‚‰ๆฏŽๆœใ‚ธใƒงใ‚ฎใƒณใ‚ฐใ‚’ๅง‹ใ‚ใ‚‹(    )。

Choices
A: ใ“ใจใซใชใ‚Šใพใ™
B: ใ“ใจใซใชใ‚Šใพใ›ใ‚“ใ‹
C: ใ“ใจใซใ—ใพใ™
D: ใ“ใจใซใ—ใพใ›ใ‚“ใ‹
Answer
C
Explanation: The energetic interjection ใ‚ˆใ— ("Alright!") signals a spontaneous personal resolution to adopt a new daily habit, making the voluntary structure 〜ใ“ใจใซใ™ใ‚‹ the only appropriate choice to convey a self-imposed commitment rather than 〜ใ“ใจใซใชใ‚‹ (an external arrangement or rule).

✏️ Correct

Find and fix the grammar mistake in the sentence.
Goal: Practice applying grammar rules and producing accurate Japanese sentences.

1: ๆฅ้€ฑใฎๆ—ฅๆ›œๆ—ฅ、ๅผ•ใฃ่ถŠใ—ใ‚’ใ—ใพใ™ใ“ใจใซใชใ‚Šใพใ—ใŸ。

Answer
ๆฅ้€ฑใฎๆ—ฅๆ›œๆ—ฅ、ๅผ•ใฃ่ถŠใ—ใ‚’ใ™ใ‚‹ใ“ใจใซใชใ‚Šใพใ—ใŸ。
Explanation: The construction 〜ใ“ใจใซใชใ‚Šใพใ—ใŸ indicates a decision or arrangement made by an external factor or official group and strictly requires a plain dictionary form verb before the nominalizer ใ“ใจ.

2: ๆฅๆœˆ、ๅธฐๅ›ฝใ—ใพใ™ใ“ใจใซใ—ใพใ™。

Answer
ๆฅๆœˆ、ๅธฐๅ›ฝใ™ใ‚‹ใ“ใจใซใ—ใพใ™。
Explanation: The pattern 〜ใ“ใจใซใ—ใพใ™ expresses a personal choice or decision and must always be preceded by a verb in its dictionary (plain) form.

3: ใกใ‚‡ใฃใจ้™ใ‹ใซใ™ใ‚‹ใใ‚Œใพใ›ใ‚“ใ‹。

Answer
ใกใ‚‡ใฃใจ้™ใ‹ใซใ—ใฆใใ‚Œใพใ›ใ‚“ใ‹。
Explanation: When asking someone to perform an action using the polite request phrasing 〜ใใ‚Œใพใ›ใ‚“ใ‹, the preceding verb must be conjugated into its ใฆ-form.

✏️ Rewrite

Rewrite the sentence using the given grammar pattern.
Goal: Practice expressing the same idea using different grammar structures.

1: ่ดˆใ‚Š็‰ฉใ‚’้ธใ‚“ใงใใ ใ•ใ„。

Rewrite the sentence using: ~ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹
Answer
่ดˆใ‚Š็‰ฉใ‚’้ธใ‚“ใงใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。
Explanation: While ้ธใ‚“ใงใใ ใ•ใ„ (erande kudasai) functions as a standard, straightforward request ("Please choose a present"), changing the structure to 〜ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹ (~te moraemasen ka) transforms it into a polite, considerate inquiry ("Could you help me choose a present?"), showing extra respect for the recipient's time and choice.

2: ไปŠๆ—ฅใ‹ใ‚‰ๆฏŽๆ—ฅ้ƒจๅฑ‹ใ‚’็‰‡ไป˜ใ‘ใพใ™。

Rewrite the sentence using: ~ใ“ใจใซใ—ใพใ™
Answer
ไปŠๆ—ฅใ‹ใ‚‰ๆฏŽๆ—ฅ้ƒจๅฑ‹ใ‚’็‰‡ไป˜ใ‘ใ‚‹ใ“ใจใซใ—ใพใ™。
Explanation: While the original ็‰‡ไป˜ใ‘ใพใ™ (katadukemasu) simply states a future action ("I will clean my room every day starting today"), using 〜ใ“ใจใซใ—ใพใ™ (~koto ni shimasu) highlights a strong, active personal decision ("I have decided to clean my room every day starting today"), adding a layer of firm commitment and self-resolve to the statement.

3: ๆฅๆœˆใ‹ใ‚‰ใ“ใฎๅญฆๆ กใฏ5ๆ™‚ใซ้–‰ใพใ‚Šใพใ™。

Rewrite the sentence using: ~ใ“ใจใซใชใ‚Šใพใ™
Answer
ๆฅๆœˆใ‹ใ‚‰ใ“ใฎๅญฆๆ กใฏ5ๆ™‚ใซ้–‰ใพใ‚‹ใ“ใจใซใชใ‚Šใพใ™。
Explanation: While the original ้–‰ใพใ‚Šใพใ™ (shimarimasu) is a simple factual statement ("This school closes at 5 o'clock starting next month"), appending 〜ใ“ใจใซใชใ‚Šใพใ™ (~koto ni narimasu) shifts the focus to an established rule, policy, or decision made by an external authority or organization ("It has been decided/arranged that this school will close at 5 o'clock starting next month"), giving it an official and objective nuance.

๐Ÿ’ฌ Complete the Dialogue

Fill in the blank to complete the conversation using the proposed grammar pattern.
Goal: Practice applying specific grammar structures to construct natural responses in realistic conversation contexts.

Complete the dialogue using: V[ใฆ-form] ใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹

Question 1:
A:ใŠ้ก˜ใ„ใŒใ‚ใ‚‹ใ‚“ใงใ™ใŒ。
B:ใฏใ„、ไฝ•ใงใ™ใ‹。
A:______。
B:ใ„ใ„ใงใ™ใ‚ˆ。

Suggested Answer
ใ“ใฎๆ›ธ้กžใ‚’ใ‚ณใƒ”ใƒผใ—ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。
Explanation: In this dialogue, Person A introduces a favor using 「ใŠ้ก˜ใ„ใŒใ‚ใ‚‹ใ‚“ใงใ™ใŒ」(I have a favor to ask) and Person B responds encouragingly with 「ใฏใ„、ไฝ•ใงใ™ใ‹」(Yes, what is it?), establishing a polite tone. The target grammar 「〜ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹」 (could you please do [action] for me?) expresses a polite request by asking if the listener is willing to perform an action for the speaker's benefit. Therefore, the Suggested Answer complete the dialogue perfectly because asking to copy documents fits the expected request structure, and Person B's positive response 「ใ„ใ„ใงใ™ใ‚ˆ」(Sure / No problem) directly accepts this polite favor.
Complete the dialogue using: V[ใฆ-form] ใใ‚Œใพใ›ใ‚“ใ‹

Question 2:
A:้ƒจๅฑ‹ใŒๆฑšใ‚Œใฆใ—ใพใฃใŸใ‚“ใงใ™ใŒ、ไปŠๆ—ฅใฏ็”จไบ‹ใŒใ‚ใ‚Šใพใ™。
B:ใใ†ใชใ‚“ใงใ™ใ‹。
A:______。
B:ใ‚ใ‹ใ‚Šใพใ—ใŸ。

Suggested Answer
ๆ‚ชใ„ใ‘ใฉ、ๅ…ˆใซๆŽƒ้™คใ—ใฆใใ‚Œใพใ›ใ‚“ใ‹。
Explanation: In this dialogue, Person A explains a personal problem by stating that their room got dirty but they are busy today with 「้ƒจๅฑ‹ใŒๆฑšใ‚Œใฆใ—ใพใฃใŸใ‚“ใงใ™ใŒ、ไปŠๆ—ฅใฏ็”จไบ‹ใŒใ‚ใ‚Šใพใ™」, to which Person B shows understanding with 「ใใ†ใชใ‚“ใงใ™ใ‹」(Is that so?). The target grammar 「〜ใฆใใ‚Œใพใ›ใ‚“ใ‹」 (could you do [action] for me?) is used to make a direct, casual request for a favor, while opening with 「ๆ‚ชใ„ใ‘ใฉ」(I'm sorry to bother you, but...) softens the ask appropriately between acquaintances or colleagues. Therefore, the Suggested Answer fits the dialogue seamlessly because asking Person B to handle the cleaning beforehand directly resolves Person A's scheduling dilemma, leading smoothly into Person B's agreement 「ใ‚ใ‹ใ‚Šใพใ—ใŸ」(Got it / Understood).
Complete the dialogue using: V[dictionary form] ใ“ใจใซใ—ใพใ™

Question 3:
A:ๆœ€่ฟ‘、ๆœ่ตทใใ‚‰ใ‚Œใชใใฆๅ›ฐใฃใฆใ„ใพใ™。
B:ๅคœ、้…ใใพใงไฝ•ใ‚’ใ—ใฆใ„ใ‚‹ใ‚“ใงใ™ใ‹。
A:ๅฐ่ชฌใ‚’่ชญใ‚“ใงใ„ใพใ™。ใงใ‚‚、ๆ˜Žๆ—ฅใ‹ใ‚‰______。
B:ใใ†ใงใ™ใ‹。ใ„ใ„ใงใ™ใญ。

Suggested Answer
ๆ—ฉใๅฏใ‚‹ใ“ใจใซใ—ใพใ™。
Explanation: In this dialogue, Person A shares a personal problem with 「ๆœ€่ฟ‘、ๆœ่ตทใใ‚‰ใ‚Œใชใใฆๅ›ฐใฃใฆใ„ใพใ™」(I'm having trouble waking up in the morning lately) and admits the cause is reading novels late at night when prompted by Person B. The target grammar 「〜ใ“ใจใซใ—ใพใ™」 (I have decided to / I will make it a rule to) is used when a speaker actively makes a personal decision or commits to a new course of action. Therefore, the Suggested Answer completes the dialogue perfectly because committing to go to bed earlier resolves the habit causing Person A's morning difficulty, which naturally prompts Person B's supportive reply 「ใใ†ใงใ™ใ‹。ใ„ใ„ใงใ™ใญ」(I see. That sounds great!).
Complete the dialogue using: V[ใฆ-form] ใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹

Question 4:
A:ใ“ใฎๅบ—ใฎๅ“็‰ฉ、ใฉใ‚Œใ‚‚ใใ‚Œใ„ใงใ™ใญ。
B:ใใ†ใงใ™ใญ。ไฝ•ใ‹่ฆ‹ใŸใ„ใ‚‚ใฎใŒใ‚ใ‚Šใพใ™ใ‹。
A:______。
B:ใฏใ„、ใฉใ†ใž。

Suggested Answer
ใใฎๅ“็‰ฉ、ใกใ‚‡ใฃใจ่ฆ‹ใ›ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹。
Explanation: In this dialogue, Person A admires the shop's items with 「ใ“ใฎๅบ—ใฎๅ“็‰ฉ、ใฉใ‚Œใ‚‚ใใ‚Œใ„ใงใ™ใญ」(Everything in this shop is so pretty, isn't it?), prompting Person B (likely a store clerk or companion) to offer help with 「ไฝ•ใ‹่ฆ‹ใŸใ„ใ‚‚ใฎใŒใ‚ใ‚Šใพใ™ใ‹」(Is there anything you'd like to see?). The target grammar 「〜ใฆใ‚‚ใ‚‰ใˆใพใ›ใ‚“ใ‹」 (could you please do [action] for me?) functions as a polite request asking someone to perform an action for the speaker's benefit, combined with the causative form 「่ฆ‹ใ›ใ‚‹」(to show). Therefore, the Suggested Answer completes the interaction naturally because asking to be shown a specific item directly answers Person B's offer, making Person B's immediate permission 「ใฏใ„、ใฉใ†ใž」(Here you go / Sure, go ahead) the expected logical follow-up.
Complete the dialogue using: V[dictionary form] ใ“ใจใซใชใ‚Šใพใ™

Question 5:
A:ๆฅๆœˆ、็”ฐไธญๅ…ˆ็”ŸใฎๆŽˆๆฅญใŒใ‚ใ‚Šใพใ™ใ‹。
B:ใ„ใ„ใˆ。็”ฐไธญๅ…ˆ็”Ÿใฏๆฅๆœˆ、______。
A:ใใ†ใชใ‚“ใงใ™ใ‹。

Suggested Answer
็”ฐไธญๅ…ˆ็”Ÿใฏๆฅๆœˆ、ๅธฐๅ›ฝใ™ใ‚‹ใ“ใจใซใชใ‚Šใพใ—ใŸ。
Explanation: In this dialogue, Person A asks whether Professor Tanaka will be teaching next month using 「ๆฅๆœˆ、็”ฐไธญๅ…ˆ็”ŸใฎๆŽˆๆฅญใŒใ‚ใ‚Šใพใ™ใ‹」(Is there Prof. Tanaka's class next month?), to which Person B replies negatively before explaining the schedule change. The target grammar 「〜ใ“ใจใซใชใ‚Šใพใ—ใŸ」 (it has been decided that...) is used to express a decision or arrangement that was determined by external circumstances, official planning, or an outside authority rather than a purely personal, immediate choice. Therefore, the Suggested Answer fits the context seamlessly because explaining that the professor is scheduled to return to his home country accounts for why his class won't take place, naturally leading to Person A's acknowledging response 「ใใ†ใชใ‚“ใงใ™ใ‹」(Is that so?).
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AI-generated content
The dialogue, images, audio, and exercises on this page were generated with the help of artificial intelligence for Japanese study practice. All content has been reviewed, adapted, and organized.

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