he can't have been there 反义疑问句 后面怎么填阿~help .

he can't haue been a dcntist.he must have been a doctor.翻译下 He can't have been.He must have been.不是说单三用has吗?这里怎么用的have? 用can't have been造句! he can't have been there 反义疑问句 后面怎么填阿~help . He can't have been ill.他那时不可能是病了.这样翻译对么 He can't find his key.He ---------- them.A.must lost B.must have been lost C.must have lost 英语翻译A.can't have been B.mustn't have been C.shouldn't have been D.wouldn't have been can’t have been与couldn’t have been的区别? -Mr Wu must have been to your house yesterday morning.-No,he___.Because he didn't know my address.could't?can't?哪个？ He must have been ill,____?Yes ,otherwise he wouldnt be absent from the party yesterday.A.isn't he B.wasnt he C.can't he D.mustn't he 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 我写的英语句子,请帮我看下对错he may has lunch at your home.he may be ill,so he can't go there.He may have been in the Egypt.I' m not sure if he ill.He can't have been jumping at that moment.I think that you must have been the fastet of 模仿例句改写句子.Example:He must be in the office.→He must have been in the office.He can't stay there.→He can't have been staying there.1.You must drive fast.__________________________2.He can't be at home__________________________3.My f can't have been和must have been每一个的用法 She can't have been Danish. and She must have been Swedish. be,must be,can't have been,must have been吗