初中英语介词知识点：时间介词(2)
2019-07-07 11:40:15中考网整理
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"after+段时间"表示过去的一段时间以后;
"after+将来点时间"表示将来的某一时刻以后。
例句：My mother will come back in three or four days.
He arrived after five months.
She will appear after five o'clock this afternoon.
(3)from, since 自从……
from仅说明什么时候开始，不说明某动作或情况持续多久;
since表示某动作或情况持续至说话时刻，通常与完成时连用。
例句：He studied the piano from the age of three.
They have lived here since 1978.
(4)after, behind 在……之后
after主要用于表示时间;
behind主要用于表示位置。
例句：We shall leave after lunch.
Lucy is hiding behind an old house.
