He can't have been ill是现在完成时?是现在完成时?那可以不可以He have can't been ill?还是必须放前面?是猜测晓得了额,CAN'T BE..但是不是现在完成时吗,为什么不是HAVE放前面呢?

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? 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 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 You pull black or don't pull black me,I have been in your heart No man can lose what he never had. bill has been to canada,so ----（have）i we can call the present ----（late）,he isn‘t in now bill has been to canada,so ----（have）i we can call the present ----（late）,he isn‘t in now I have never been there.He hasn’t been there,either.(改为同义句）I have never been there._______　＿＿＿＿＿ he. He can't find his key.He ---------- them.A.must lost B.must have been lost C.must have lost 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 用can't have been造句! How and what can I do I have been have no choice .I don't know how to say 英语选择.填空.连词成句1.i saw him yesterday.he__to America.A.mustn't have been.B.mustn't have gone.C.can't have gone.D.can't have gone.2.the old man__（retire)two years ago3.he said that he__(can)help me whit my work.4.let me__(introduce)m Neither he nor I（ ）to Beijing.A、have been B、has been C、haven’t been D、hasn’t been 英语翻译Pure --Fool's Garden I can't understand what I have seen I can't recall where I have been Can't find the words I wish to say,I can't be near can't get away I cannot do the things I should,I wish I could I can't say where,I can't say when,