Day N5 - 8 - Grammar Practice

Complementary Exercises: Daily N5 - Day 8

After reading the lesson text, practice the grammar points introduced in Day N5-8.

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

Grammar practiced:
✓ い-adj
✓ い-adj N です
✓ N は おうですか
✓ N は い-adj くãĻ~
✓ N は い-adj く V
✓ ~が、~

1. Understand

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

🔍 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: å›ŗæ›¸é¤¨ã¸čĄŒããžã—ãŸãŒ、å…Ĩりぞせんでした。
B: おåĨŊãŋį„ŧãã¯įžŽå‘ŗã—ããĻ、å…¨éƒ¨éŖŸãšãžã—ãŸ。
C: 昨æ—Ĩは暑いでした。
D: į§ã¯åå‰ã‚’å¤§ããæ›¸ããžã—ãŸ。
Answer
C
Correct Sentence: 昨æ—Ĩã¯æš‘ã‹ãŖãŸã§ã™。
Explanation: Japanese い-adjectives form their past tense by changing the final い to ã‹ãŖãŸ, so 暑い becomes æš‘ã‹ãŖãŸ. When speaking politely, です can be added after this past form: æš‘ã‹ãŖãŸã§ã™. Unlike nouns and ãĒ-adjectives, an い-adjective does not normally form the past tense by keeping its dictionary form and adding でした.

2: Which sentence is grammatically incorrect?

Choices
A: あれは大きい大å­Ļです。
B: 明æ—Ĩはæ—Ĩ曜æ—Ĩが、į§ã¯äģ•äē‹ã‚’しぞす。
C: æ¯ã¯å‘ŗå™Œæąã‚’į†ąãã—ãžã—ãŸ。
D: å›ŗæ›¸é¤¨ã¯ãŠã†ã§ã—ãŸã‹。
Answer
B
Correct Sentence: 明æ—Ĩはæ—Ĩ曜æ—Ĩですが、į§ã¯äģ•äē‹ã‚’しぞす。
Explanation: The particle が can mark the subject of a clause, but it cannot by itself connect two complete statements with the meaning “but.”

3: Which sentence is grammatically incorrect?

Choices
A: ä슿œã¯æš‘くãĻ、å…Ŧ園を歊きぞせんでした。
B: こぎ席はおうですか。
C: å›ŗæ›¸é¤¨ã¯å¤§ãããĻ、éŖŸå ‚ã‚‚ã‚ã‚Šãžã™。
D: æ¯ã¯å‘ŗå™Œæąã‚’į†ąããĻしぞした。
Answer
D
Correct Sentence: æ¯ã¯å‘ŗå™Œæąã‚’į†ąãã—ãžã—ãŸ。
Explanation: When an い-adjective describes the result of changing something with する, it changes from 〜い to 〜く, as in į†ąã„ → į†ąãã™ã‚‹, meaning “to make something hot.” The 〜くãĻ form is mainly used to connect adjectives or clauses, so it cannot be used directly before しぞした in this pattern.

4: Which sentence is grammatically incorrect?

Choices
A: おåĨŊãŋį„ŧãã¯įžŽå‘ŗã—ã„ã§ã™。
B: 英čĒžã¯ãŠã†ã§ã™ã‹。
C: 夜は寒いです。
D: å›ŗæ›¸é¤¨ã¯å¤§ãããĻです、éŖŸå ‚ã‚‚ã‚ã‚Šãžã™。
Answer
D
Correct Sentence: å›ŗæ›¸é¤¨ã¯å¤§ãããĻ、éŖŸå ‚ã‚‚ã‚ã‚Šãžã™。
Explanation: When an い-adjective is used to connect one description to another, change the final い to くãĻ, as in 大きい → 大きくãĻ.

✅ Choice

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

1: 昨æ—Ĩは(      )。

Choices
A: 暑いでした
B: æš‘ã‹ãŖãŸã§ã™
C: 暑くでした
D: 暑いです
Answer
B
Explanation: The adjective 暑い is an い-adjective, so its polite past form is made by changing い to ã‹ãŖãŸ and adding です, giving æš‘ã‹ãŖãŸã§ã™.

2: å‘ŗå™Œæąã¯(      )、ãĄã‚‡ãŖã¨åž…ãĄãžã—ãŸ。

Choices
A: į†ąã„ã§
B: į†ąã‹ãŖãŸãĻ
C: į†ąãã§ã—ãŸ
D: į†ąããĻ
Answer
D
Explanation: į†ąã„ is an い-adjective, and when an い-adjective connects to another clause, it changes from 〜い to 〜くãĻ, so į†ąã„ becomes į†ąããĻ.

3: おåĨŊãŋį„ŧきは(      )、å…¨éƒ¨éŖŸãšãžã—ãŸ。

Choices
A: įžŽå‘ŗã—ãã§ã—ãŸ
B: įžŽå‘ŗã—ã„ã§
C: įžŽå‘ŗã—ã‹ãŖãŸãĻ
D: įžŽå‘ŗã—ããĻ
Answer
D
Explanation: įžŽå‘ŗã—ã„ is an い-adjective, and to connect it to another clause, the final い changes to くãĻ, giving įžŽå‘ŗã—ããĻ.

4: å‘ŗå™Œæąã¯(      )、ãĄã‚‡ãŖã¨åž…ãĄãžã—ãŸ。

Choices
A: į†ąã„ã§
B: į†ąã‹ãŖãŸãĻ
C: į†ąãã§ã—ãŸ
D: į†ąããĻ
Answer
D
Explanation: į†ąã„ is an い-adjective, and its ãĻ-form is made by changing the final い to くãĻ, giving į†ąããĻ. This form connects the adjective to the following clause and can express a reason, so it naturally explains why the speaker waited a little.

✏️ Correct

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

1: ã“ã‚Œã¯į†ąã„ã§ã™å‘ŗå™Œæąã§ã™。

Answer
ã“ã‚Œã¯į†ąã„å‘ŗå™Œæąã§ã™。
Explanation: When an い-adjective directly modifies a noun, it is placed immediately before the noun in its plain form, without です.

2: 名前は大きい書きぞした。

Answer
名前は大きく書きぞした。
Explanation: When an い-adjective describes how an action is performed, change the final い to く to make the adverbial form.

3: 昨æ—Ĩは暑いãĻ、å…Ŧåœ’ã¸čĄŒããžã›ã‚“ã§ã—ãŸ。

Answer
昨æ—Ĩは暑くãĻ、å…Ŧåœ’ã¸čĄŒããžã›ã‚“ã§ã—ãŸ。
Explanation: To connect an い-adjective to another clause, change the final い to くãĻ.

2. Practice

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

🔍 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: ä슿œã¯æš‘ã‹ãŖãŸã§ã™。
B: あれは大きいå­Ļæ Ąã§ã™。
C: おåĨŊãŋį„ŧãã¯įžŽå‘ŗã—ã„ã§ã™ãŒ、å…¨éƒ¨ã¯éŖŸãšãžã›ã‚“ã§ã—ãŸ。
D: ã“ãŽå›ŗæ›¸é¤¨ã¯ãŠã†ãĒですか。
Answer
D
Correct Sentence: ã“ãŽå›ŗæ›¸é¤¨ã¯ãŠã†ã§ã™ã‹。
Explanation: おう means “how” or “what ... like?” and can be followed directly by ですか to ask for an opinion or description. It is not a ãĒ-adjective, so ãĒ cannot be inserted between おう and です.

2: Which sentence is grammatically incorrect?

Choices
A: ã“ã‚Œã¯į†ąã„å‘ŗå™Œæąã§ã™。
B: į§ã¯ãŠåĨŊãŋį„ŧãã‚’įžŽå‘ŗã—ãéŖŸãšãžã—ãŸ。
C: ä슿œ、äģ•äē‹ã¯ãŠã†ã§ã—たか。
D: ä슿™Šã¯å¯’くありぞせんですが、å…Ŧåœ’ã¸čĄŒããžã›ã‚“。
Answer
D
Correct Sentence: ä슿™Šã¯å¯’くありぞせんが、å…Ŧåœ’ã¸čĄŒããžã›ã‚“。
Explanation: In polite negative forms of い-adjectives, 〜くありぞせん already contains the polite ending, so です is not inserted before the conjunction が.

3: Which sentence is grammatically incorrect?

Choices
A: įˆļã¯å‘ŗå™Œæąã‚’į†ąã„ãĢしぞした。
B: į§ã¯åå‰ã‚’å¤§ããæ›¸ããžã›ã‚“ã§ã—ãŸ。
C: あれは大きい大å­Ļです。
D: おåĨŊãŋį„ŧãã¯įžŽå‘ŗã—ã„ã§ã™ãŒ、å…¨éƒ¨ã¯éŖŸãšãžã›ã‚“ã§ã—ãŸ。
Answer
A
Correct Sentence: įˆļã¯å‘ŗå™Œæąã‚’į†ąãã—ãžã—ãŸ。
Explanation: When an い-adjective is used with する to mean “make something [adjective],” change the final い to く, as in į†ąã„ → į†ąãã™ã‚‹.

4: Which sentence is grammatically incorrect?

Choices
A: ä슿œ、äģ•äē‹ã¯ãŠã†ã§ã—たか。
B: ã“ãŽå›ŗæ›¸é¤¨ã¯å¤§ãããĻ、éŖŸå ‚ã‚‚ã‚ã‚Šãžã™。
C: įˆļã¯å‘ŗå™Œæąã‚’į†ąãã—ãžã—ãŸ。
D: ã‚ã‚Œã¯įžŽå‘ŗã—ã„ãĒéŖŸãšį‰Šã§ã™。
Answer
D
Correct Sentence: ã‚ã‚Œã¯įžŽå‘ŗã—ã„éŖŸãšį‰Šã§ã™。
Explanation: įžŽå‘ŗã—ã„ is an い-adjective, and い-adjectives can modify a noun directly without ãĒ, as in įžŽå‘ŗã—ã„éŖŸãšį‰Š. The particle ãĒ is used before nouns with ãĒ-adjectives, such as 静かãĒ場所, so įžŽå‘ŗã—ã„ãĒéŖŸãšį‰Š is incorrect.

5: Which sentence is grammatically incorrect?

Choices
A: į§ã¯ãŠåĨŊãŋį„ŧãã‚’įžŽå‘ŗã—ãéŖŸãšãžã—ãŸ。
B: ã‚ã‚Œã¯å¤§ãã„å›ŗæ›¸é¤¨ã§ã™。
C: ä슿œã¯æš‘ã‹ãŖãŸãĻ、å…Ŧ園をčĩ°ã‚Šãžã›ã‚“でした。
D: å‘ŗå™Œæąã¯į†ąã„ã§ã™ãŒ、å…¨éƒ¨éŖŸãšãžã—ãŸ。
Answer
C
Correct Sentence: ä슿œã¯æš‘くãĻ、å…Ŧ園をčĩ°ã‚Šãžã›ã‚“でした。
Explanation: To connect an い-adjective to another clause with 〜ãĻ, change the final い to くãĻ, as in 暑い → 暑くãĻ. The past form æš‘ã‹ãŖãŸ cannot take ãĻ by simply adding it as æš‘ã‹ãŖãŸãĻ. When the adjective gives the reason or background for a past action, 暑くãĻ can still be used even though the following verb is in the past tense.

✏️ Correct

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

1: å‘ŗå™Œæąã¯į†ąã„ãĻ、éŖŸãšãžã›ã‚“。

Answer
å‘ŗå™Œæąã¯į†ąããĻ、éŖŸãšãžã›ã‚“。
Explanation: To connect an い-adjective to a following clause, replace the final い with くãĻ. Therefore, į†ąã„ becomes į†ąããĻ, not į†ąã„ãĻ.

2: 明æ—Ĩは水曜æ—Ĩですだが、å­Ļæ Ąã¸čĄŒããžã›ã‚“。

Answer
明æ—Ĩは水曜æ—Ĩですが、å­Ļæ Ąã¸čĄŒããžã›ã‚“。
Explanation: To connect a noun sentence politely with が (“but”), use ですが, not ですだが. The form だが is built from the plain copula だ, while ですが is the corresponding polite form.

3: おåĨŊãŋį„ŧãã¯įžŽå‘ŗã—ã„ãĻ、å…¨éƒ¨éŖŸãšãžã—ãŸ。

Answer
おåĨŊãŋį„ŧãã¯įžŽå‘ŗã—ããĻ、å…¨éƒ¨éŖŸãšãžã—ãŸ。
Explanation: To connect an い-adjective to a following clause, replace the final い with くãĻ. Therefore, įžŽå‘ŗã—ã„ becomes įžŽå‘ŗã—ããĻ, not įžŽå‘ŗã—ã„ãĻ.

4: ä슿œã¯å¯’くãĒいãĻ、å…Ŧ園を歊きぞした。

Answer
ä슿œã¯å¯’くãĒくãĻ、å…Ŧ園を歊きぞした。
Explanation: To connect the negative form of an い-adjective to another clause, change 〜くãĒい to 〜くãĒくãĻ. Therefore, 寒くãĒい becomes 寒くãĒくãĻ, not 寒くãĒいãĻ. This form can naturally connect the condition of “not being cold” with the action that follows.

5: å›ŗæ›¸é¤¨ã¯å¤§ãã„ãĒい。

Answer
å›ŗæ›¸é¤¨ã¯å¤§ãããĒい。
Explanation: To make an い-adjective negative, replace the final い with くãĒい. Therefore, 大きい becomes 大きくãĒい, not 大きいãĒい. This negative form can be used directly as the predicate of a sentence.

✏️ Rewrite

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

1: å›ŗæ›¸é¤¨ã¸čĄŒããžã—ãŸ。å…Ĩりぞせんでした。

Rewrite the sentence using: ~が、~
Answer
å›ŗæ›¸é¤¨ã¸čĄŒããžã—ãŸãŒ、å…Ĩりぞせんでした。
Explanation: The particle が connects two clauses while showing a contrast between them. Here, the first clause creates the expectation that going to the library would normally be followed by entering it, but the second clause presents an unexpected or contrasting result. Compared with simply stating the two sentences separately, ~が、~ makes the relationship between the actions clearer and gives the sentence a smoother, more connected flow.

2: おåĨŊãŋį„ŧãã¯įžŽå‘ŗã—ã„ã§ã™。å…¨éƒ¨éŖŸãšãžã—ãŸ。

Rewrite the sentence using: N は い-adj くãĻ~
Answer
おåĨŊãŋį„ŧãã¯įžŽå‘ŗã—ããĻ、å…¨éƒ¨éŖŸãšãžã—ãŸ。
Explanation: The ~くãĻ form connects an い-adjective to what follows, and it can suggest that the first description is related to the following result. Here, įžŽå‘ŗã—ã„ changes to įžŽå‘ŗã—ããĻ, giving the nuance that its being delicious naturally led to eating all of it. Compared with stating the ideas separately, this structure makes the cause-and-result relationship feel smoother and more closely connected.

3: これはおåĨŊãŋį„ŧきです。įžŽå‘ŗã—ã„ã§ã™。

Rewrite the sentence using: い-adj N です
Answer
ã“ã‚Œã¯įžŽå‘ŗã—ã„ãŠåĨŊãŋį„ŧきです。
Explanation: An い-adjective can directly modify a noun without changing its form. Here, įžŽå‘ŗã—ã„ describes おåĨŊãŋį„ŧき, so the two separate ideas are combined into one noun phrase. This structure is more compact and natural when you want to describe what kind of thing the noun is.

4: į§ã¯å­Ļį”Ÿã§ã™。åŧŸã¯äŧšį¤žå“Ąã§ã™。

Rewrite the sentence using: ~が、~
Answer
į§ã¯å­Ļį”Ÿã§ã™ãŒ、åŧŸã¯äŧšį¤žå“Ąã§ã™。
Explanation: The particle が connects two clauses and can show a mild contrast between them. Here, the speaker’s status and the younger brother’s status are different, so が links the two pieces of information naturally without making the contrast sound too strong. Compared with saying the sentences separately, this pattern makes the comparison between the two people clearer and smoother.

5: ã‚ã‚Œã¯å›ŗæ›¸é¤¨ã§ã™。大きいです。

Rewrite the sentence using: い-adj N です
Answer
ã‚ã‚Œã¯å¤§ãã„å›ŗæ›¸é¤¨ã§ã™。
Explanation: An い-adjective can be placed directly before a noun to describe it. Here, 大きい gives information about what kind of library it is, so combining the ideas this way sounds more concise and natural than presenting the description in a separate sentence.

đŸ’Ŧ 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: い-adj N です

Question 1:
A:こぎ鞄ãĢパã‚Ŋã‚ŗãƒŗã‚’å…ĨれãĻもいいですか。
B:はい。čŗ‡æ–™ã‚‚å…¨éƒ¨å…Ĩりぞす。
A:そうですか。____________。

Suggested Answer
大きい鞄ですね。
Explanation: After B explains that the bag has enough space for the computer and all the documents, A naturally reacts by commenting on one of its noticeable qualities. The Suggested Answer: 大きい鞄ですね uses 大きい to describe 鞄, following the target pattern い-adjective + noun + です. The particle ね also makes the response sound conversational because A is expressing a new realization based on what B has just said.
Complete the dialogue using: N は い-adj くãĻ~

Question 2:
A:ä슿™Š、å…Ŧåœ’ã§æ•Ŗæ­Šã—ãžã›ã‚“ã‹。
B:____________。
A:そうですか。åŽļãĢいぞしょう。

Suggested Answer
ä슿™Šã¯å¯’くãĻ、æ•Ŗæ­Šã—ãžã›ã‚“。
Explanation: A invites B to take a walk in the park, so B needs to give a reason for not wanting to go. The Suggested Answer: ä슿™Šã¯å¯’くãĻ、æ•Ŗæ­Šã—ãžã›ã‚“ connects the condition 寒い to the following negative action by changing the い-adjective to its ~くãĻ form, which matches the target grammar N は い-adj くãĻ~. However, while the meaning is understandable, Japanese more naturally uses ~くãĻ when the second part clearly expresses a result or consequence of the first condition.
Complete the dialogue using: ~が、~

Question 3:
A:こぎおåĨŊãŋį„ŧãã¯į†ąã„ã§ã™ã­。
B:____________。

Suggested Answer
į†ąã„ã§ã™ãŒ、įžŽå‘ŗã—ã„ã§ã™。
Explanation: B responds to A’s comment by acknowledging one characteristic of the food and then adding a contrasting positive opinion. The Suggested Answer: į†ąã„ã§ã™ãŒ、įžŽå‘ŗã—ã„ã§ã™ uses が to connect two contrasting ideas, showing that although the okonomiyaki is hot, it is still delicious. This makes the response fit the context naturally while clearly practicing the target grammar ~が、~.
Complete the dialogue using: N は おうですか

Question 4:
A:こぎおåĨŊãŋį„ŧãã¯įžŽå‘ŗã—ã„ã§ã™ã­。
B:はい、とãĻã‚‚įžŽå‘ŗã—ã„ã§ã™。
A:____________。
B:å‘ŗå™Œæąã‚‚įžŽå‘ŗã—ã„ã§ã™。

Suggested Answer
å‘ŗå™Œæąã¯ãŠã†ã§ã™ã‹。
Explanation: After both speakers agree that the okonomiyaki is delicious, A shifts the conversation to another item on the table and asks for B’s opinion about it. The Suggested Answer: å‘ŗå™Œæąã¯ãŠã†ã§ã™ã‹ follows the target pattern N はおうですか, which is used to ask how someone feels about or evaluates a particular thing. B’s reply then fits naturally because it gives a positive opinion about the miso soup.
Complete the dialogue using: N は おうですか

Question 5:
A:į§ã¯ãƒŠãƒŧãƒĄãƒŗã‚’éŖŸãšãžã™。
B:そうですか。
A:____________。
B:į§ã¯ãŠåĨŊãŋį„ŧãã‚’éŖŸãšãžã™。

Suggested Answer
あãĒたはおうですか。
Explanation: After A says what they are going to eat, it is natural to ask B about their choice next. The Suggested Answer: あãĒたはおうですか uses the target pattern N はおうですか to shift the topic to B and ask about their situation or preference. Because the topic of food has already been established, the question does not need to repeat “what will you eat,” and B’s answer about choosing okonomiyaki follows naturally.
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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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