since的意义和用法

sinceKK:[]DJ:[]ad。(常用于现在完成时或过去完成时)1。此后;从那时到现在She left school three years ago and has worked as a nurse ever since。她三年前毕业,从那时起便一直当护士。2。之前,以前prep。1。(常用于现在完成时或过去完成时)自。。。以来,从。。。至今I haven't heard from him since last year。我自去年以来未曾收到过他的信。conj。1。(常用于现在完成时或过去完成时)自。。。以来,从。。。至今It's been ten years since they married。他们结婚到现在已经十年了。She has been living a hard life since her husband died。她自从丈夫死后,一直过着艰苦的生活。2。既然;因为,由于He must have taken the book since it isn't here。他一定是把书拿走了,因为书已不在这里了。Since it is so hot,let's go swimming。既然天气这么热,我们去游泳吧。以上结果由 Dr。eye译典通字典 提供