since后面加时间点,表示现在完成时。

需要注意的是，since所连接的时间点必须都是过去的时间。

短语：

since then 自那以后 ；

long since 很久以前；

ever since 从那时到现在；

since when 自什么时候起

扩展资料

since

prep.

自…以后;从…以来;(表示气愤)何曾，什么时候

conj.

从…以后;自…以来;因为;由于;既然

adv.

自…以后;从…以来;此后;后来

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。

She's been using since she was 13.

她从13岁起就吸毒。

His quality of life has improved dramatically since the operation.

手术后他的生活质量大大改善了。

It's a long time since they left.

他们已经离开很久了。