They didn't have finished it by last Sunday.为什么didn't have要改成hadn't?

they were ( )because they didn 't havethey were ( )because they didn 't have lunch (They must have been there yesterday ,______they?)能用weren't they 还是didn't they? they must have seen the film last week,didn't they?为什么要用didn't they呢?they must have seen the film last week,didn't they?为什么要用didn't they呢? They didn't have finished it by last Sunday.为什么didn't have要改成hadn't? They haven't paid for their tickets,have they?-----_____.They didn't pay any money.A Yes,they have.B No,they haven't. They have got to leave for the airport tight away,____?A.haven't they B.don't they C.didn't they D.have they They must have finished the work,---?A,mustn't they B,haven't they C,hadn't they D,didn't they They must have been here the day before yesterday,__________?A.mustn't they B.didn't they C.mustn't have they D.had they 为什么有yesterday 就要用didn't they?A.为什么不可以呢? They should have gone earlier,___ 请问为什么要didn't they They must have played computer games for several hours,didn't they?怎么改? They must have done their homework yesterday,___?为什么是didn't they?我觉得应该是haven't they啊? they have never seen the film___?A.haven't they B.did they c. didn't they D.have they 说明原因 They came here to have a metting on time,____?A.didn't they B.did they C.don't they D.do they They must have arrived by now,haven't they?为什么用haven't they?不用didn't they?by now 布什表示过去发生的吗 一道英语改错题,帮帮忙,O(∩_∩)O谢谢!They didn't have finished it by last Sunday.为什么didn't have要改成hadn't? They _____ about it,I'm sure they didn't know.A.must have knowB.mustn't knowC.can't have knownD.can't know 一道英语选择,These trees must have been planted three years ago,____?A weren't they B must't theyC didn't they D haven't they 2)They must have arrived by now,haven't they?为什么是haven't they?谁帮我讲一下什么时候用didn’t 什么时候用haven’t