I have done it very well in our subjects.其中"done"是及物动词,为什么后面的“it”要去掉~

I have done it very well in our subjects.其中done是及物动词,为什么后面的“it”要去掉~ Have you done it yet?3问3答 I have‘t done it yet.I’ve already done it.【yes,I have done it】现在完成时句 My teacher is very i___ at what I have done. Should it matter what I do what I have done? It was ,I should say,very kind of you to come all the way to help them,but you ___.A.didnt have to B.wouldnt have doneC.mustnt have done D.mightnt have done It should have been a travel of joy,but I feel very worried.should have done这类是叫真实条件句么? Some have done it? Look at what you have done! The milk everywhere. Oh, I'm very sorry abouy that.这句话怎么翻译And I'm dealing with it right now I have no idea as to how it is done. i suppose you have done it 改为否定句 I have done so. You have done a good job. ___ A.No,I don't do well enough. B.You are welcome.C.It's very kind of you.答案 理由 I can do it well./ I have done it well 意思.I can do it well./ I have done it well 意思. 用can't have been/done must have been /done 改写句子例：I don't believe he did it 答:He can't have done it问：I don't believe you tried very hardI think he passed all the examsI don't bellieve you were at the office on SuadayI think she met 用（can't ） （ have been/done ） （must have been /done） 改写句子例：I don't believe he did it 答:He can't have done it问：I don't believe you tried very hardI think he passed all the examsI don't bellieve you were at the office on 用（can't ） （ have been/done ） （must have been /done） 改写句子例：I don't believe he did it 答:He can't have done it问：I don't believe you tried very hardI think he passed all the examsI don't bellieve you were at the office on 翻译I wanted to have him done the job,but he had it done instead Thank you very much indeed.If it had not been for your advice I really what I should have done.A.don’t know B.didn’t know C.hadn’t known D.wouldn’t have known