preposition/conjunction/adverb

since

自从, 既然, 此后

I have lived here since 2010.

我从2010年起就住在这里。

Since you're busy, I'll go alone.

既然你很忙,我就一个人去。

He left and I haven't seen him since.

他离开了,此后我再也没见过他。

((+ 时间点)) 自从 I have lived here since 2010.

((+ 从句)) 既然,因为 Since you're busy, I'll go alone.

((在句末)) 此后 I haven't seen him since.

同义词: because, as, from

源自古英语 'siððan'(在那之后),由 'sið'(之后)和 'ðan'(那时)组成。

请记住,'since' 既可以指时间(从过去某个时间点到现在),也可以指原因(因为)。

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