N5 Grammar · Test 28

Option 1 (安く) is correct. The pattern is い-adjective stem + く + して + ください, meaning 'please make it ~.' 安い (やすい, cheap) drops い and becomes 安く, giving 安くしてください ('please make it cheaper'). The speaker says 'It's expensive. Please make it cheaper,' so this fits perfectly.

• 2安くに adds an unnecessary に. The adverbial form of an い-adjective is just く, not くに.
• 3安いに uses the dictionary form 安い followed by に, which is grammatically incorrect in this pattern. You must use the adverbial く-form before して.
• 4安い is the plain adjective form. Before して you need the adverbial く-form (安く), not the dictionary form.

• 高たかい — expensive, high
• 安やすい — cheap, inexpensive
• 〜てください — please do ~ (request pattern)

Option 2 (出かけた) is correct. The grammar pattern V-た + あとで means 'after doing ~.' 出かけたあとで means 'after (my family) goes out.' The past tense (た-form) is required before あとで, so 出かけた is the correct choice.

• 1出かける is the dictionary form. Before あとで you need the た-form (出かけた), not the dictionary form.
• 3出出かけます uses the ます-form, which cannot directly connect to あとで. (Also, the kanji 出 appears duplicated — see issues.)
• 4出かけていた is the past progressive ていた-form. While not entirely impossible in some contexts, the standard and expected form before あとで is the simple た-form 出かけた.

• 出でかける — to go out
• 〜たあとで — after doing ~
• 掃除そうじ — cleaning

ひとりも means 'not even one person' and must be followed by a negative predicate. 来ていません is the negative te-iru form, so ひとりも来ていません = 'Not a single Japanese person has come (to the party).' This is grammatically and contextually correct.

• 2来ています is affirmative. ひとりも requires a negative, so this is grammatically impossible.
• 3来ます is affirmative (non-past). ひとりも requires a negative, so this cannot work.
• 4来ました is affirmative (past). ひとりも requires a negative (e.g., ひとりも来ませんでした), so this is incorrect.

• ひとりも — not even one person (requires negative predicate)
• パーティー — party