选词填空（can't have been\must be\must have been\can't be \may ha

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选词填空（can't have been\must be\must have been\can't be \may have been\may be)
He was in hospital yesterday.He___ill.
She has eaten a lot of meat at lunch.She____very tired.
He has eaten a lot of meat at lunch.He___seriously ill.
Bob___to Tokyo.He knows nothing about the place at all.
Where is Harry?He___in his room.I'm not sure.
Why was he late?He___busy.I'm not sure.

$选词填空（can't have been\must be\must have been\can't be \may ha$

may be
must be
can‘t be
can’t have be
may be
may be
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选词填空（can't have been\must be\must have been\can't be \may ha be,must be,can't have been,must have been吗 A.must be B.may have been C.can have been D.could be ,为什么呢, can't have been和must have been 英语：助动词的问题he must（can't may等） have been asleep,就有两个助动词,must , 用must have been/done或can*t have been/done 改写句子 he can't have been Danish.he must have been Swedish. She can't have been Danish. and She must have been Swedish. 用（can't ）（ have been/done ）（must have been /done）改写句子用can't have been/done must have been /done 改写句子 must have been和can't have been和现在完成时有没有联系啊 He can't have been.He must have been.不是说单三用has吗?