since副词 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,以前介词 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。连接词 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
自从 since或ever sincesince [sins]conj.因为;由于;既然;自…以来;自…以后prep.自…以来;自…以后adv.后来例句:He hasn't been home since last year.自从去年至今他未回过家.Since the new management syste...