关于I have ever seenIt is the largest crowd I have ever seen.I have ever seen在这里是个什么用法?做什么语?

关于I have ever seenIt is the largest crowd I have ever seen.I have ever seen在这里是个什么用法?做什么语? 英语it is the most interesting book that i have ever seenit is the most interesting book that i have ever seen 中的that可以省略吗 I__（not see）the film with you because I have seenit already I have ever been I have ever met you,为社么要加EVER The best story I have ever the best place i have ever been I would like to have you ever! I have ever( )( ) make dumplings from mom 告诉我Most的用法,并说明理由That was the( )boring film I've ever seenIt's strange,beacuse( )of my friend enjoyed itIt was one of the( )longest films I've ever seen,too( )shops in our little town are closed on wednesday afternoonThe( )annoyi —Have you seen the TV play My Ugly Mother?__Yes,it's well worth( ).It's ()moving that I've seenit twice.A.seeing,too B.to see,enough C.seeing,so D.to,see such 求讲解.关于虚拟语气的.”Have you ever been to Beijing?““No,but I wish I had”为什么不是but I wish I have呢? This is the least interesting book I have ever read翻译全文,还有I have ever This is the most difficult test I have ever done翻译全文,还有I have ever Have you ever missed me just as I have? 关于Have you been Have you ever been to Peking?yes,i have been there -----Athree timesBfor three timesCfor two months(我主要想问c为什么不对) Have you ever studied _______a group?Yes ,I have.I have learned a ______ that way. I don't think I have ever told you this.把have去掉保留ever或者把ever去掉保留have对、可以吗?为什么