Day N4 - 1 - Grammar Practice

Complementary Exercises: Daily N4 - Day 1

After reading the lesson text, practice the grammar points introduced in Day N4-1.

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[ใฆ-form]ใฟใพใ™/V[ใฆ-form]ใฟใŸใ„ใงใ™
✓ 〜ใใ†ใงใ™
✓ 〜ใ‚“ใงใ™
✓ 〜ใ™ใŽใพใ™
✓ 〜ใ‹ใฉใ†ใ‹
✓ V[ใฆ-form]ใใพใ™

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.
Goal: Train your ability to notice incorrect grammar patterns and avoid common mistakes.

1: Which sentence is grammatically incorrect?

Choices
A: ๅฝผใŒๆฅใ‚‹ใ‹ใฉใ†ใ‹็ขบใ‹ใ‚ใฆใใพใ™。
B: ใ‚ใฎไบบใฏๅญฆ็”Ÿใ˜ใ‚ƒใชใ„ใ‚“ใงใ™ใ‹。
C: ๆ–ฐใ—ใ„ใ‚ซใƒกใƒฉใ‚’ไฝฟใฃใฆใฟใพใ—ใŸ。
D: ใ“ใฎๅ‘ณๅ™Œๆฑใฏ็†ฑใ„ใ™ใŽใพใ™。
Answer
D
Correct Sentence: ใ“ใฎๅ‘ณๅ™Œๆฑใฏ็†ฑใ™ใŽใพใ™。
Explanation: With i-adjectives, remove ใ„ before ใ™ใŽใ‚‹.

2: Which sentence is grammatically incorrect?

Choices
A: ๅค–ใฏๅฏ’ใใ†ใงใ™。
B: ใ“ใฎใ‚ฒใƒผใƒ ใ‚’ใ‚„ใฃใฆใฟใŸใ„ใงใ™。
C: ใ“ใฎใ‚ตใƒฉใƒ€ใฏๅกฉใ™ใŽใพใ™。
D: ้ง…ๅ‰ใง็ฅญใ‚ŠใŒใ‚ใ‚‹ใ‚“ใงใ™。
Answer
C
Correct Sentence: ใ“ใฎใ‚ตใƒฉใƒ€ใฏๅกฉใŒๅคšใ™ใŽใพใ™。
Explanation: 「~ใ™ใŽใ‚‹」 cannot attach directly to the noun ๅกฉ.

3: Which sentence is grammatically incorrect?

Choices
A: ใ“ใฎใƒ‘ใƒณใฏใจใฆใ‚‚ใŠใ„ใ—ใ„ใงใ™ใ‚“ใงใ™。
B: ใ‚ใฎไบบใฏ็œ ใใ†ใงใ™ใญ。
C: ๆ—ฅๆœฌใฎใŠ่Œถใ‚’้ฃฒใ‚“ใงใฟใพใ—ใŸ。
D: ้ฃฒใฟใ™ใŽใฏไฝ“ใซๆ‚ชใ„ใงใ™ใ‚ˆ。
Answer
A
Correct Sentence: ใ“ใฎใƒ‘ใƒณใฏใจใฆใ‚‚ใŠใ„ใ—ใ„ใ‚“ใงใ™。
Explanation: 「ใŠใ„ใ—ใ„ใงใ™ใ‚“ใงใ™」 incorrectly adds an extra ใงใ™.

4: Which sentence is grammatically incorrect?

Choices
A: ใ‚ใฎๆ˜ ็”ปใ‚’่ฆ‹ใฆใฟใพใ›ใ‚“ใ‹。
B: ใฉใ†ใ—ใฆๆณฃใ„ใŸใ‚“ใงใ™ใ‹。
C: ใ“ใฎๅบ—ใฎใ‚ฑใƒผใ‚ญใฏใŠใ„ใ—ใใ†ใงใ™。
D: ้ฃŸในใ‚‹ใ™ใŽใฆใŠใชใ‹ใŒ็—›ใ„ใงใ™。
Answer
D
Correct Sentence: ้ฃŸในใ™ใŽใฆใŠใชใ‹ใŒ็—›ใ„ใงใ™。
Explanation: 「~ใ™ใŽใ‚‹」 attaches to the verb stem, not the dictionary form.

✅ Choice

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

1: ใ“ใฎใ‚นใƒผใƒ—、ๅ‘ณใŒ(    )ไฝ•ใ‹ๅ…ฅใ‚ŒใŸใปใ†ใŒใ„ใ„。

Choices
A: ่–„ใ™ใŽใฆ
B: ่–„ใ•ใง
C: ่–„ใใ†ใง
D: ่–„ใใ†ใงใ™
Answer
A
Explanation: 「่–„ใ™ใŽใฆ」 means “too thin/weak in flavor,” expressing excess. The context suggests the flavor is insufficient, so an adjustment is needed.

2: ใŠๅœŸ็”ฃใ‚’(    )。ใฉใ†ใž。

Choices
A: ่ฒทใ„ใ™ใŽใพใ—ใŸ
B: ่ฒทใฃใฆใใพใ—ใŸ
C: ่ฒทใ†ใงใ—ใ‚‡ใ†
D: ่ฒทใ†ใใ†ใงใ™
Answer
B
Explanation: 「่ฒทใฃใฆใใพใ—ใŸ」 shows the action of going, buying, and coming back. The offering 「ใฉใ†ใž」 makes it clear the speaker has returned with the souvenir.

3: ใ‚ใฎไบบใฏ้ง…ๅ‰ใฎใƒ‡ใ‚ถใƒผใƒˆๅบ—ใฎใ‚ชใƒผใƒŠใƒผ(    )。

Choices
A: ใ ใใ†ใงใ™
B: ใ ใ‹ใฉใ†ใ‹
C: ใซใชใ‚Šใใ†ใงใ™
D: ใใ†ใงใ™
Answer
A
Explanation: 「ใ ใใ†ใงใ™」 is the hearsay form used after nouns and ใช-adjectives, meaning "I heard that...". 「ใใ†ใงใ™」 alone cannot directly follow a noun. 「ใ ใ‹ใฉใ†ใ‹」 requires a following clause (e.g., ใ‚ใ‹ใ‚Šใพใ›ใ‚“), and 「ใซใชใ‚Šใใ†ใงใ™」 means "looks like will become...", which changes the meaning of the sentence.

4: ใ‚ใฎใƒ‡ใ‚ถใƒผใƒˆใฏใจใฆใ‚‚ไบบๆฐ—ใŒใ‚ใ‚‹ใใ†ใงใ™。็งใ‚‚ใฉใ‚“ใชๅ‘ณใ‹(    )ใงใ™。

Choices
A: ้ฃŸในใ™ใŽใพใ™
B: ้ฃŸในใŸใใ†ใงใ™
C: ้ฃŸในใ‚‰ใ‚Œใใ†ใงใ™
D: ้ฃŸในใฆใฟใŸใ„
Answer
D
Explanation: 「~ใฆใฟใŸใ„」 means "want to try doing something." Because the speaker wants to find out what the dessert tastes like, 「้ฃŸในใฆใฟใŸใ„」 is the only natural choice. The other options express eating too much or hearsay, not the speaker's own wish.

✏️ Correct

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

1: ใ‚ใฎๅบ—ใซใŠใ„ใ—ใ„ใใ†ใชใƒ‡ใ‚ถใƒผใƒˆใŒใ‚ใ‚Šใพใ™。

Answer
ใ‚ใฎๅบ—ใซใŠใ„ใ—ใใ†ใชใƒ‡ใ‚ถใƒผใƒˆใŒใ‚ใ‚Šใพใ™。
Explanation: To express appearance with an ใ„-adjective, drop the final ใ„ and add ใใ†. ใŠใ„ใ—ใ„ → ใŠใ„ใ—ใใ†.

2: ๅ‚ๅŠ ใ—ใพใ™ใ‹ใฉใ†ใ‹ใพใ ๆฑบใ‚ใฆใ„ใพใ›ใ‚“。

Answer
ๅ‚ๅŠ ใ™ใ‚‹ใ‹ใฉใ†ใ‹ใพใ ๆฑบใ‚ใฆใ„ใพใ›ใ‚“。
Explanation: Before ใ‹ใฉใ†ใ‹, the verb must be in the plain form. ใ—ใพใ™ is the polite form; the correct plain form is ใ™ใ‚‹.

3: ็ฅญใ‚Šใซๅ‚ๅŠ ใ—ใฆใฟใ‚‹ใพใ›ใ‚“ใ‹。

Answer
็ฅญใ‚Šใซๅ‚ๅŠ ใ—ใฆใฟใพใ›ใ‚“ใ‹。
Explanation: The polite negative of ใฟใ‚‹ is ใฟใพใ›ใ‚“, not ใฟใ‚‹ใพใ›ใ‚“. The invitation pattern is ~ใฆใฟใพใ›ใ‚“ใ‹.

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.
Goal: Train your ability to notice incorrect grammar patterns and avoid common mistakes.

1: Which sentence is grammatically incorrect?

Choices
A: ๆ–ฐใ—ใ„ๆœใ‚’็€ใฟใพใ—ใŸ。
B: ้ง…ๅ‰ใซๅคงใใ„ใ‚นใƒผใƒ‘ใƒผใŒใงใใŸใใ†ใงใ™。
C: ใใฎใ‚ซใƒใƒณ、้ซ˜ใ™ใŽใพใ™ใ‚ˆ。
D: ๅฝผใŒๆฅใ‚‹ใ‹ใฉใ†ใ‹ใพใ ใ‚ใ‹ใ‚Šใพใ›ใ‚“。
Answer
A
Correct Sentence: ๆ–ฐใ—ใ„ๆœใ‚’็€ใฆใฟใพใ—ใŸ。
Explanation: 「~ใฆใฟใ‚‹」 needs the te-form. 「็€ใฟใพใ—ใŸ」 is missing ใฆ; the correct form is 「็€ใฆใฟใพใ—ใŸ」.

2: Which sentence is grammatically incorrect?

Choices
A: ไปŠใซใ‚‚้›จใŒ้™ใ‚‹ใใ†ใช็ฉบใงใ™ใญ。
B: ใกใ‚‡ใฃใจไผ‘ใ‚“ใงใฟใพใ›ใ‚“ใ‹。
C: ๅ‚ๅŠ ใงใใ‚‹ใ‹ใฉใ†ใ‹ใพใ ใ‚ใ‹ใ‚Šใพใ›ใ‚“。
D: ๆœ€่ฟ‘、็–ฒใ‚Œใ™ใŽใฆไฝ•ใ‚‚ใ—ใŸใใชใ„ใ‚“ใงใ™。
Answer
A
Correct Sentence: ไปŠใซใ‚‚้›จใŒ้™ใ‚Šใใ†ใช็ฉบใงใ™ใญ。
Explanation: To describe something that appears about to happen, Japanese uses the verb stem + 「ใใ†ใช」. Therefore, 「้™ใ‚Šใใ†ใช็ฉบ」 means "a sky that looks like it's about to rain." 「้™ใ‚‹ใใ†」 is not the appearance form; 「ใใ†ใงใ™」 after a dictionary-form verb expresses hearsay ("I heard it will rain") and cannot modify 「็ฉบ」 in this way.

3: Which sentence is grammatically incorrect?

Choices
A: ใ“ใฎใ‚ฑใƒผใ‚ญ、ใŠใ„ใ—ใใ†ใงใ™ใญ。
B: ๆœ€่ฟ‘、้‹ๅ‹•ใ—ใ™ใŽใฆ่†ใŒ็—›ใ„ใ‚“ใงใ™。
C: ใกใ‚‡ใฃใจใ“ใฎใŠ่Œถใ‚’้ฃฒใฟใฆใฟใพใ™。
D: ๆ˜Žๆ—ฅใฎๅคฉๆฐ—ใŒใ„ใ„ใ‹ใฉใ†ใ‹่ชฟในใฆใใพใ™。
Answer
C
Correct Sentence: ใกใ‚‡ใฃใจใ“ใฎใŠ่Œถใ‚’้ฃฒใ‚“ใงใฟใพใ™。
Explanation: The te-form of ้ฃฒใ‚€ is ้ฃฒใ‚“ใง, not ้ฃฒใฟใฆ. The sentence must be 「้ฃฒใ‚“ใงใฟใพใ™」.

4: Which sentence is grammatically incorrect?

Choices
A: ใ“ใฎใƒ‡ใ‚ถใƒผใƒˆใ‚’้ฃŸในใฆใฟใŸใ„ใงใ™。
B: ใ“ใฎๆค…ๅญใฏ็กฌใ™ใŽใฆๅบงใ‚Šใซใใ„ใงใ™。
C: ๅ…ˆ็”ŸใŒๆฅๆœˆ็ตๅฉšใ—ใพใ™ใใ†ใงใ™。
D: ๅฝผใŒๆœฌๅฝ“ใซๆฅใ‚‹ใ‹ใฉใ†ใ‹็–‘ๅ•ใงใ™。
Answer
C
Correct Sentence: ๅ…ˆ็”ŸใŒๆฅๆœˆ็ตๅฉšใ™ใ‚‹ใใ†ใงใ™。
Explanation: Hearsay ใใ†ใงใ™ attaches to the plain form, not the polite form.

5: Which sentence is grammatically incorrect?

Choices
A: ็”˜ใ„ใ‚‚ใฎใฐใ‹ใ‚Š้ฃŸในใฆ、ๅคชใ‚Šใ™ใŽใพใ—ใŸ。
B: ้ง…ๅ‰ใฎ็ฅญใ‚Šใซ่กŒใฃใฆใฟใพใ—ใŸ。
C: ้ซ˜ใ„ใใ†ใชๆ™‚่จˆใ‚’่ฆ‹ใคใ‘ใพใ—ใŸ。
D: ใ“ใฎๆœฌใฏใจใฆใ‚‚้ข็™ฝใ„ใ‚“ใงใ™。
Answer
C
Correct Sentence: ้ซ˜ใใ†ใชๆ™‚่จˆใ‚’่ฆ‹ใคใ‘ใพใ—ใŸ。
Explanation: For appearance, drop the final ใ„ of i-adjectives before ใใ†.

✏️ Correct

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

1: ๅฝผใŒๅญฆ็”Ÿใ ใ‹ใฉใ†ใ‹็Ÿฅใ‚Šใพใ›ใ‚“。

Answer
ๅฝผใŒๅญฆ็”Ÿใ‹ใฉใ†ใ‹็Ÿฅใ‚Šใพใ›ใ‚“。
Explanation: After a noun, ใ‹ใฉใ†ใ‹ follows directly without ใ . ๅญฆ็”Ÿใ ใ‹ใฉใ†ใ‹ is ungrammatical; use ๅญฆ็”Ÿใ‹ใฉใ†ใ‹.

2: ๆ˜จๆ—ฅใƒ‡ใ‚ถใƒผใƒˆใ‚’้ฃŸในใ‚‹ใ™ใŽใพใ—ใŸ。

Answer
ๆ˜จๆ—ฅใƒ‡ใ‚ถใƒผใƒˆใ‚’้ฃŸในใ™ใŽใพใ—ใŸ。
Explanation: ใ™ใŽใ‚‹ attaches to the verb stem. ้ฃŸในใ‚‹ is the dictionary form; the stem is ้ฃŸใน.

3: ใ‚ใฎใƒฉใƒผใƒกใƒณใฏ่พ›ใ„ใ ใใ†ใงใ™。

Answer
ใ‚ใฎใƒฉใƒผใƒกใƒณใฏ่พ›ใ„ใใ†ใงใ™。
Explanation: For hearsay, ใ„-adjectives attach directly to ใใ†ใงใ™ without ใ . ่พ›ใ„ใ ใใ†ใงใ™ is incorrect; use ่พ›ใ„ใใ†ใงใ™.

4: ใฉใ†ใ—ใฆ้…ใ‚ŒใŸใงใ™ใ‹?

Answer
ใฉใ†ใ—ใฆ้…ใ‚ŒใŸใ‚“ใงใ™ใ‹?
Explanation: When asking for an explanation or reason, the explanatory ใ‚“ใงใ™ is required. ้…ใ‚ŒใŸ is plain past, so ้…ใ‚ŒใŸใ‚“ใงใ™ใ‹.

5: ๅฝผใŒๆฅใพใ›ใ‚“ใงใ—ใŸใ‹ใฉใ†ใ‹็Ÿฅใฃใฆใ„ใพใ™ใ‹。

Answer
ๅฝผใŒๆฅใชใ‹ใฃใŸใ‹ใฉใ†ใ‹็Ÿฅใฃใฆใ„ใพใ™ใ‹。
Explanation: ใ‹ใฉใ†ใ‹ requires the plain form. ๆฅใพใ›ใ‚“ใงใ—ใŸ is polite past negative; the plain form is ๆฅใชใ‹ใฃใŸ.

✏️ Rewrite

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

1: ๆ˜จๆ—ฅ、้ง…ๅ‰ใงๆ–ฐใ—ใ„ๅบ—ใ‚’ๆŽขใ—ใพใ—ใŸ。

Rewrite the sentence using: ~ใฆใฟใพใ—ใŸ
Answer
ๆ˜จๆ—ฅ、้ง…ๅ‰ใงๆ–ฐใ—ใ„ๅบ—ใ‚’ๆŽขใ—ใฆใฟใพใ—ใŸ。
Explanation: 「~ใฆใฟใพใ—ใŸ」 is the past tense of “try doing”. The verb ๆŽขใ™ takes the ใฆ-form ๆŽขใ—ใฆ, and ใฟใพใ—ใŸ is added to indicate that the speaker attempted to search for the shop.

2: ๅฝผใŒๆ—ฅๆœฌไบบใ‹、็Ÿฅใฃใฆใ„ใพใ™ใ‹。

Rewrite the sentence using: ~ใ‹ใฉใ†ใ‹
Answer
ๅฝผใŒๆ—ฅๆœฌไบบใ‹ใฉใ†ใ‹、็Ÿฅใฃใฆใ„ใพใ™ใ‹。
Explanation: With nouns, simply add ใ‹ใฉใ†ใ‹ after the noun. ๆ—ฅๆœฌไบบใ‹ becomes ๆ—ฅๆœฌไบบใ‹ใฉใ†ใ‹, meaning “whether he is Japanese or not”. The structure is noun + ใ‹ใฉใ†ใ‹.

3: ใ“ใฎใƒ‡ใ‚ถใƒผใƒˆใฏใŠใ„ใ—ใ„ใงใ™。

Rewrite the sentence using: ~ใใ†ใงใ™
Answer
ใ“ใฎใƒ‡ใ‚ถใƒผใƒˆใฏใŠใ„ใ—ใใ†ใงใ™。
Explanation: The i-adjective ใŠใ„ใ—ใ„ changes to ใŠใ„ใ—ใใ†ใงใ™ (stem + ใใ†ใงใ™). It turns a statement of fact into an appearance-based judgement: “this dessert looks delicious”.

4: ้ง…ๅ‰ใฎๅ…ฌๅœ’ใฏ้™ใ‹ใงใ™。

Rewrite the sentence using: ~ใ‚“ใงใ™
Answer
้ง…ๅ‰ใฎๅ…ฌๅœ’ใฏ้™ใ‹ใชใ‚“ใงใ™。
Explanation: Na-adjectives require ใช before ใ‚“ใงใ™. ้™ใ‹ใงใ™ → ้™ใ‹ใชใ‚“ใงใ™ (plain ้™ใ‹ใ  → ้™ใ‹ใช + ใ‚“ใงใ™). The sentence gains an explanatory nuance.

5: ๆ˜Žๆ—ฅ、็ฅญใ‚Šใซๅ‚ๅŠ ใ—ใพใ™。

Rewrite the sentence using: ~ใ‚“ใงใ™
Answer
ๆ˜Žๆ—ฅ、็ฅญใ‚Šใซๅ‚ๅŠ ใ™ใ‚‹ใ‚“ใงใ™。
Explanation: 「~ใ‚“ใงใ™」 adds an explanatory or background-information nuance. Before 「ใ‚“ใงใ™」, verbs use the plain form, so 「ๅ‚ๅŠ ใ—ใพใ™」 changes to 「ๅ‚ๅŠ ใ™ใ‚‹」. Therefore, 「ๆ˜Žๆ—ฅ、็ฅญใ‚Šใซๅ‚ๅŠ ใ™ใ‚‹ใ‚“ใงใ™」 is correct.

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.
Goal: Train your ability to notice incorrect grammar patterns and avoid common mistakes.

1: Which sentence is grammatically incorrect?

Choices
A: ใ“ใฎๆœบใฏ้ซ˜ใ™ใŽใฆ่ฒทใˆใพใ›ใ‚“。
B: ใกใ‚‡ใฃใจใใฎๆœฌใ‚’่ชญใ‚“ใงใฟใŸใ„ใงใ™。
C: ๆญฉใ„ใฆใ™ใŽใฆ็–ฒใ‚Œใพใ—ใŸ。
D: ๆ˜Žๆ—ฅ、้›จใŒ้™ใ‚‹ใใ†ใงใ™。
Answer
C
Correct Sentence: ๆญฉใใ™ใŽใฆ็–ฒใ‚Œใพใ—ใŸ。
Explanation: 「~ใ™ใŽใ‚‹」 takes the verb stem. 「ๆญฉใ„ใฆใ™ใŽใฆ」 is incorrect.

2: Which sentence is grammatically incorrect?

Choices
A: ใฉใ†ใ—ใฆ้…ใ‚Œใพใ—ใŸใ‚“ใงใ™ใ‹。
B: ใ“ใฎใ‚ธใƒฃใ‚ฑใƒƒใƒˆใฏๅฐใ•ใ™ใŽใพใ™。
C: ใ‚ใฎใƒฌใ‚นใƒˆใƒฉใƒณใซ่กŒใฃใฆใฟใŸใ„ใงใ™。
D: ๆ˜Žๆ—ฅใฏๆ™ดใ‚Œใใ†ใงใ™。
Answer
A
Correct Sentence: ใฉใ†ใ—ใฆ้…ใ‚ŒใŸใ‚“ใงใ™ใ‹。
Explanation: 「ใ‚“ใงใ™」 follows the plain past form.

3: Which sentence is grammatically incorrect?

Choices
A: ้›จใŒ้™ใ‚Šใใ†ใงใ™ใ‹ใ‚‰、ๅ‚˜ใ‚’ๆŒใฃใฆ่กŒใใพใ™。
B: ๅŒ—ๆตท้“ใซ่กŒใฃใฆใฟใŸใ„ใพใ™。
C: ๆ˜จๆ—ฅใฏ้ฃŸในใ™ใŽใพใ—ใŸ。
D: ใ“ใฎ่‚‰、็กฌใใฆ้ฃŸในใ‚‰ใ‚Œใชใ„ใ‚“ใงใ™。
Answer
B
Correct Sentence: ๅŒ—ๆตท้“ใซ่กŒใฃใฆใฟใŸใ„ใงใ™。
Explanation: The polite volitional form is 「~ใฆใฟใŸใ„ใงใ™」. 「่กŒใฃใฆใฟใŸใ„ใพใ™」 incorrectly mixes ใŸใ„ with ใพใ™; the correct polite ending is ใงใ™.

4: Which sentence is grammatically incorrect?

Choices
A: ใ“ใฎใ‚ขใƒ—ใƒชใ‚’ไฝฟใ†ใฟใพใ—ใŸ。
B: ใŠใชใ‹ใŒ็—›ใ„ใ‚“ใงใ™。
C: ใ“ใฎใƒ‘ใƒณใฏ็กฌใ™ใŽใพใ™。
D: ๆ˜Žๆ—ฅใฏ้›จใŒ้™ใ‚Šใใ†ใงใ™。
Answer
A
Correct Sentence: ใ“ใฎใ‚ขใƒ—ใƒชใ‚’ไฝฟใฃใฆใฟใพใ—ใŸ。
Explanation: 「~ใฆใฟใพใ™」 requires the te-form. 「ไฝฟใ†ใฟใพใ—ใŸ」 uses the dictionary form; it should be 「ไฝฟใฃใฆใฟใพใ—ใŸ」.

✅ Choice

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

1: ๅฝผใฏๅฟƒ้…(    )、็œ ใ‚Œใชใ‹ใฃใŸใใ†ใงใ™。

Choices
A: ใ™ใ‚‹ใ‹ใฉใ†ใ‹
B: ใ™ใ‚‹ใฎใง
C: ใ—ใ™ใŽใฆ
D: ใ—ใใ†ใง
Answer
C
Explanation: 「ๅฟƒ้…ใ—ใ™ใŽใฆ」 is the verb 「ๅฟƒ้…ใ™ใ‚‹」 + 「ใ™ใŽใ‚‹」 in the ใฆ-form, meaning “worry too much and as a result.” It explains the cause of not being able to sleep.

2: ใฉใ†ใ—ใฆ้…ใ‚ŒใŸใ‚“ใงใ™ใ‹。―― ้›ป่ปŠใŒ(    )ใ‚“ใงใ™。

Choices
A: ้…ใ‚ŒใŸ
B: ้…ใ‚Œใ‚‹ใใ†
C: ้…ใ‚Œใใ†
D: ้…ใ‚Œใ‚ˆใ†
Answer
A
Explanation: 「~ใ‚“ใงใ™」 is used to provide an explanation in response to a question. The past tense plain form 「้…ใ‚ŒใŸ」 + 「ใ‚“ใงใ™」 correctly explains the reason for being late.

3: ใ“ใฎๅบ—ใฎใƒฉใƒผใƒกใƒณใฏใŠใ„ใ—ใใฆ、ใคใ„(    )ใ—ใพใ„ใพใ—ใŸ。

Choices
A: ้ฃŸในใ‚‹ใฎใง
B: ้ฃŸในใŸใใฆ
C: ้ฃŸในใ™ใŽใฆ
D: ้ฃŸในใ‚ˆใ†ใจใ—ใฆ
Answer
C
Explanation: 「้ฃŸในใ™ใŽใฆใ—ใพใ„ใพใ—ใŸ」 means "ended up eating too much." The pattern 「~ใ™ใŽใฆใ—ใพใ†」 expresses an excessive action that happened unintentionally or with regret. Since the ramen was delicious and the speaker says 「ใคใ„」 ("without meaning to"), 「้ฃŸในใ™ใŽใฆใ—ใพใ„ใพใ—ใŸ」 is the best choice.

4: ใ“ใฎใƒœใ‚ฟใƒณใ‚’ๆŠผใ—ใฆ、ๆฉŸๆขฐใŒๅ‹•ใ(    )็ขบ่ชใ—ใฆใใ ใ•ใ„。

Choices
A: ใ‹ใฉใ†ใ‹
B: ใชใฎใง
C: ใ™ใŽใพใ™
D: ใใ†ใงใ™
Answer
A
Explanation: 「ๅ‹•ใใ‹ใฉใ†ใ‹็ขบ่ชใ™ใ‚‹」 means “check whether it moves or not.” The set phrase 「ใ‹ใฉใ†ใ‹」 is required for embedding a yes/no alternative.

✏️ Correct

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

1: ใ‚ใฎ็กฌใ„ใƒ‘ใƒณใ‚’้ฃŸในใฆใฟใ‚ŠใŸใใชใ„ใงใ™。

Answer
ใ‚ใฎ็กฌใ„ใƒ‘ใƒณใ‚’้ฃŸในใฆใฟใŸใใชใ„ใงใ™。
Explanation: The negative of ใฟใŸใ„ is ใฟใŸใใชใ„. “ใฟใ‚ŠใŸใใชใ„” is a common overgeneralization of ~ใ‚Š forms; the correct conjugation is ใฟใŸใใชใ„.

2: ๆ˜จๆ—ฅ、้›จใŒ้™ใ‚Šใพใ—ใŸใ‚“ใงใ™。

Answer
ๆ˜จๆ—ฅ、้›จใŒ้™ใฃใŸใ‚“ใงใ™。
Explanation: ใ‚“ใงใ™ requires the plain past form. ้™ใ‚Šใพใ—ใŸ is polite; the correct plain past is ้™ใฃใŸ.

3: ใ‚ใฎๆ˜ ็”ปใฏๆ€–ใ„ใ™ใŽใพใ—ใŸ。

Answer
ใ‚ใฎๆ˜ ็”ปใฏๆ€–ใ™ใŽใพใ—ใŸ。
Explanation: ใ™ใŽใ‚‹ attaches to the adjective stem. ๆ€–ใ„ → ๆ€–ใ™ใŽ, not ๆ€–ใ„ใ™ใŽ.

✏️ Rewrite

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

1: ใ‚ใฎๅญใฏๅ…ƒๆฐ—ใงใ™。

Rewrite the sentence using: ~ใใ†ใงใ™
Answer
ใ‚ใฎๅญใฏๅ…ƒๆฐ—ใใ†ใงใ™。
Explanation: 「~ใใ†ใงใ™」 expresses appearance or impression based on what the speaker sees. With ใช-adjectives, remove 「ใงใ™」 and add 「ใใ†ใงใ™」: ๅ…ƒๆฐ—ใงใ™ → ๅ…ƒๆฐ—ใใ†ใงใ™.

2: ใกใ‚‡ใฃใจ้ง…ๅ‰ใง่ฒทใ„็‰ฉใ‚’ใ—ใฆ、ใ™ใๆˆปใ‚Šใพใ™。

Rewrite the sentence using: Vใฆ-form ใใพใ™
Answer
ใกใ‚‡ใฃใจ้ง…ๅ‰ใง่ฒทใ„็‰ฉใ‚’ใ—ใฆใใพใ™。
Explanation: Vใฆ-form + ใใพใ™ expresses going to do something and then coming back. The original “do shopping and then return” is compressed into ่ฒทใ„็‰ฉใ‚’ใ—ใฆใใพใ™, a very natural pattern.

3: ใกใ‚‡ใฃใจใ‚ณใƒณใƒ“ใƒ‹ใซ่กŒใฃใฆ、ใ™ใๆˆปใ‚Šใพใ™。

Rewrite the sentence using: Vใฆ-form ใใพใ™
Answer
ใกใ‚‡ใฃใจใ‚ณใƒณใƒ“ใƒ‹ใซ่กŒใฃใฆใใพใ™。
Explanation: ่กŒใฃใฆใใพใ™ is the set phrase for “I’m going and coming back”. It preserves the meaning of leaving briefly and returning, using the ใฆ-form of ่กŒใ + ใใพใ™.
⚠️
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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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