for ;since的用法He has been away from China ____three years ago.A.inB./C.for D.since

for ;since的用法He has been away from China ____three years ago.A.inB./C.for D.since for和since的用法 since for的具体用法 since与for的用法 he has kept my book for months.kept的用法 as ,since,because,for 的用法? since.Been .For现在完成时的用法 since和for的区别用法 英语when,while,since,for的用法? for与since的用法与区别 一个句子中有for用现在完成时还是过去完成时?就是一些关于过去完成时或现在完成时的用法.有since一般是过去完成时,have/has+been+过去分词但是在一个句子中有for,例如：he （ ）（ ）a（ ）（ It______five years since he has left for Beijing. 有6题有关for及since用法,帮我看一下好吗?1.She has studies English 【for】three years .2.He has been at the hotel 【since】yesterday .3.She has lived in Brazil 【for】a long time .4.He has taught Italian 【since】last September .5 since和for用法 has had的用法He has had some noodles for breakfast.(some noodles 划线)______ ______ he ______ for breakfast? He has been there (for)six months.这句话里 for 的用法 ,以及能不能省略. it has been since.用法 You should make allowances for your husband,since he has been very busy these days这里的since是什么意思,自从不是只能接时间点?