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英语问题They _____here since they arrived hereA. lived B. live C

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英语问题
They _____here since they arrived here
A. lived B. live C. have lived D. had lived
答案是:C 我也可以用:are 吗?为什么?谢谢!
我记得:It is 3 days since he came here.
不可以.
当有SINCE时,句子要用现在完成时,所以选C.
It is 3 days since he come here.没有用完成时,是因为这句里有come,come是个点动词,表示的动作有一个终点,到了终点不能再延续,(“来”这个动作到了“这”就不能再继续“来”了).所以不能用完成时.