He _writing the paper now.He hadn't written a single word wh

He _writing the paper now.He hadn't written a single word when i left him ten minutes ago.
A.shouldn't be B.can't have finished C.can't be D.mustn't have finished
我选的是A 答案为什么是b

无情猫咪 1年前已收到3个回答举报

imok80 幼苗

共回答了17个问题采纳率：88.2% 举报

can't have finished
1.虚拟语气表猜测,否定式can't 【而不用shouldn't】
2.have finished 现在完成时表完成.
这句要表达的意思是,他现在一定还没有完成作业,十分钟前,当我离开他的时候,他还没有动笔.

1年前

malu5890 幼苗

共回答了35个问题举报

虚拟语气！shouldn't be后接动词原形！

1年前

marshell1968 幼苗

共回答了4个问题举报

1年前

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你能帮帮他们吗

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