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例如：

On Christmas Day

On the night of March 10

At+時(shí)間點(diǎn)

例如：

At 3 o′clock at the harvest time

固定詞組

at night at last at first at once

at this time of the year at the beginning of

at the same time

注意：在表示時(shí)間里，下列情況下一般不用介詞：

next/last/this/that/tomorrow/yesterday/one/every/all以及the day before yesterday和the day after tomorrow前不用介詞。

例如：不能說(shuō)in tomorrow 只能說(shuō)tomorrow

(2)for+時(shí)間段

Since+過(guò)去的時(shí)間點(diǎn)/或者表示過(guò)去式的從句，這兩種都表示“延續(xù)的一段時(shí)間”，常與完成時(shí)態(tài)連用。

例如：

He has lived here for ten years.

He has lived here since 1991.

He has lived here since he left school.

(3)在…之后

In+一段時(shí)間(用于一般將來(lái)時(shí))

After+一段時(shí)間(用于一般過(guò)去時(shí))

After+一點(diǎn)時(shí)間(常用于一般將來(lái)時(shí))

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