表示时间的 at、on、in (A1)

记住这个搭配：at + 具体的钟点。

at = 具体的钟点

• Class starts at 7 o'clock.
• Amina wakes up at 6.
• We meet at noon.
• Not "Class starts in 7 o'clock." — say "Class starts at 7 o'clock.". 具体钟点要用 at，不是 "in"。
• 试一试: Amina wakes up ___ 6 o'clock. (at / in / on) 答案: at — 具体钟点用 at：at 6 o'clock。"in" 是用在月份这类更长的时间段上的。

on = 某一天或某个日期

记住这个搭配：on + 某一天或某个日期。

• We have class on Monday.
• Amina arrives on May 15th.
• The party is on Saturday.
• Not "We have class in Monday." — say "We have class on Monday.". 某一天要用 on，不是 "in"。
• 试一试: We have class ___ Monday. (on / in / at) 答案: on — 星期几用 on：on Monday。"in" 是用在月份等更长的时间段上的。

in = 月份、年份或季节

记住这个搭配：in + 较长的时间段，比如月份、年份或季节。

• Amina's birthday is in May.
• The school opened in 2024.
• It's cold in winter.
• Not "Amina's birthday is at May." — say "Amina's birthday is in May.". 像月份这种较长的时间段要用 in，不是 "at"。
• 试一试: Amina's birthday is ___ May. (in / at / on) 答案: in — 月份用 in：in May。"at" 是用在具体钟点上的，不是月份。
• 试一试: The party is ___ Saturday. (on / in / at) 答案: on — Saturday 是一天，所以用 on：on Saturday。"in" 用于月份；"at" 用于具体钟点。

in the morning，但 at night

记住这些：in the morning / afternoon / evening，但 at night。

• Amina studies in the morning.
• We have class in the afternoon.
• Hiroshi reads at night.
• Not "Hiroshi reads in night." — say "Hiroshi reads at night.". 我们说 in the morning / afternoon / evening，但夜晚要说 at night。
• 试一试: Hiroshi reads ___ night. (at / in / on) 答案: at — Night 是个例外，用 at：at night。是 "in the morning" 但 "at night"，不是 "in night"。
• 试一试: Class starts ___ 8 o'clock. (at / on / in) 答案: at — 具体钟点用 at：at 8 o'clock。"on" 用于某一天；"in" 用于月份。