I bought the bike three years before和I have seen the film ag

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I bought the bike three years before和I have seen the film ago为什么错

正确的：I bought the bike three years ago.
I have seen the film before.
一般过去时一般与...ago连用,只表示过去发生过的事,不强调对现在的影响.
现在完成时一般与...before连用,表示过去发生的事,但对现在存有影响.
I saw the film two days ago.表示两天前看了电影,强调发生过,但与现在没什么关联
I have seen the film before.不强调不过什么时候看的,但是强调对现在的影响：例如不想再看一遍了,或者了解电影的剧情.

I bought the bike three years before和I have seen the film ag I have bought the bike和I have bought the bike for two years, i have seen the film before i have seen the film already 和i have already seen the film的区 I have seen the film already.和I have already seen the film.有 I have already seen the film.和 I have seen the film already. I've seen the film already.和I have already seen the film有啥区别 I have seen the film already. 和I have alreadyseen the film . -have you ever seen the film?-yes I ＿it three times when I l I have seen the film.和I saw the film.什么区别 I have never seen _____ film before. 1.I have never seen the film ( ).A.a month ago B.before C.ju