- at / in / on ・・・ 時刻・時間・年月日・曜日・季節・年齢
- for / during / in / since / from … to / through ・・・ 期間（～の間）
- by / until / till / in / within / up to ・・・ 期限・範囲（～まで）
- before / after ・・・ 前後
- past / beyond ・・・ 超過
［at：時＝時刻・年齢］
時の一点、時刻、時節、年齢を表す。
- We close at 2:30.
- Tom retired at 65.
- I have lunch at noon.
- The family had a special dinner at Christmas.
- He works at night.
［in：時＝年・月・季節］
期間 ( 月・季節・年 など ) を表す。
- He was born in 1992.
- Bill went to Los Angeles in May.
- She will come to Japan in summer.
- The movie starts at 7:00 in the evening
［on：時＝日付・曜日］
日付・曜日や、特定の日の朝・昼・夜 を表す。
- The twins arrived in the U.S. on January 22.
- Let's meet on Sunday.
- The party is held on Saturday night.
→ 課題 #12
→ 文法 #35 前置詞の一覧
→ 文法 #66 時を表す前置詞（for / during / in / since / from … to / through）
→ 文法 #67 時を表す前置詞（by / until / till / in / within / up to）
→ 文法 #68 時を表す前置詞（before / after）
→ 文法 #69 時を表す前置詞（past / beyond）
