1. since conj. 自从…以来; 自从…的时候起; 既然; 因为 (后面加句子)
表示自从......以来时,常常用完成时
She's a changed woman since she got that job.她自从得到了那份工作,变得判若两人。
I have known him ever since I was a child. 我自孩提时代起就已经认识他了.
2. since adv. 以后,此后; 后来;
He disappeared many years since.
他多年以前就不知去向。
Her husband died 10 years ago but she has since remarried.
她丈夫于十年前去世, 但她后来又嫁人了。
3.since prep. 从…以来; 自从…之后; 自 (后面加名词)
I've been here since the end of June. 自6月末以来我就一直呆在这儿。
I have not seen him since then.
从那以后我再也没见过他。
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