有have seen的用法么?怎么用的?它是过去式么？

有have seen的用法么?怎么用的?它是过去式么？ seen的用法 have been seeing /have been seen/ have seen的用法.以及I was saw 和I saw的用法请说清楚过去时和完成时的用法. I have ever seen.和I have never seen.紧急~这两句话的意思分别是什么?ever不是曾经的意思吗?那应该怎么翻译?用法有什么区别?这是我看过的最好的电影是：This is the best movie I've ever seen在这里I've ever 关于already的用法-Did you see the movie yesterday?-No,because I____it already.A.saw B.would see C. was seeing D.had seen这道题是选D吧?但是为什么不用have seen而用had seen? have you seen的意思 have的用法有哪些? 有have have done 的用法吗 have never seen 与have ever seen 的区别,怎么感觉在翻译的时候差不多啊 had ever seen和have ever seen的区别 have seen had seen的区别 急要啊 have we met before have you seen me这两个句子有什么区别?主要是想知道用的场景 many a 的用法Many a boy and many a girl______it since then.A.have seen B.has seen 这个句子选A还是B,为甚麽? have had的用法是什么哈?第三人称单数怎么用? have和has的用法?怎么区分`` be seen 的用法比如说“他被看到在玩游戏”之类的,被动.be seen 什么时候用be seen doing?什么时候是be seen to do?什么时候是be seen do? have to和must的用法有区别么? have seen的延续性动词是什么?