in・on・at（時間）

時間介系詞 in、on、at

Time prepositions: in, on, at — English grammar, junior high

接續

at ＋時刻（at 7:00、at night、at noon）・on ＋日期、星期（on Monday、on May 5）・in ＋月份、季節、年、一天的時段（in July、in 2025、in the morning）

at + clock time (at 7:00, at night) · on + day, date (on Monday, on May 5) · in + month, season, year, part of day (in July, in 2025, in the morning)

範圍越小越精確用 at，一天用 on，比一天長的用 in：I have a meeting at three on Friday.、My birthday is in December.

at for exact times, on for days, in for anything longer: I have a meeting at three on Friday, My birthday is in December.

特定某一天的早上用 on：on Sunday morning。
A particular day's morning takes on: on Sunday morning.
前面有 this、next、last、every 時不加介系詞：next week、every day。
No preposition with this, next, last, every: next week, every day.

✗ in Monday
✓ on Monday
星期幾用 on。
Days take on.
✗ I'll see you on next week.
✓ I'll see you next week.
next 前面不加介系詞。
No preposition before next.

The class starts at 8:10.

八點十分上課。

We celebrate Mid-Autumn Festival in September or October.

我們在九月或十月過中秋節。

What do you usually do on weekends?

你週末通常做什麼？

在 Hanabiの小天地聽例句的錄音、做 3 題練習，答對 2/3 就算學會，進度會記下來。