i had finished it already写的对吗

i had finished it already写的对吗 When I ___ on the TV,it had finished already. ( ) you( ) your homework?yes,I finished it an hour ago.A did finish B have finished C.had finished 翻译i haven't finished it yet,because i had a headache yesterday如题 if I had finished my homrwork,I would have gone travelling.What does it mean?mean! Have you finished you composition already?yes,I ()it in twenty minutesHave you finished you composition already?Yes,I ( ) it in twenty minutes.A have finished B finished C will finish D had finished 请说明一下原因 Have you finished your composition already?Yes.I ____(finish)it in twenty minutes.为什么是填 finished 而不是 填 had finished I already had a finished authorization letter and sent it to Phyllis before.求教, It was not until midnight that I finished my homework 中的finished 可以换成 had finished 我非常累,因为直到半夜我才完成我的家庭作业 that 后面可以换成 had finished ,即过去完成时吗? I have just finished it she was writing a book last year but i don't know whether she had finished it.为什么不是wrote It was not until I had finished all my homework that I went to bed last night.这里为什么要用had? i had never had it i have finished my homework,为什麼不i had? I __my homework ,mom?Really?When did you finish it?A finished B have finished C had finished请给出原因 还有,请问finish 是延续性动词还是非延续性动词,有完成时吗? -- When _____ you _____ your homework?--I had finished it befor he_____ back.A.have;finished;came B.have;finished;was comingC.did;finish;came C.did finish;was coming ----Has Tom finished his home work yet?----I have no idea;he[ ] it this morning.A.was doing B.had been doing C.had done D.did “Can you wait until I finished it ”