谁知道could not have
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谁知道could not have
谁知道could not have
谁知道could not have
应该做却还没有做
不得不做某事
谁知道could not have
could not have done
must not have been;could not have
Could not help but have to
can not have visited could have visited must have visited should not have visitedcan not have visitedcould have visitedmust have visited should not have visited
In fact,you did not know they could have been
could not
could not
If it _ for the rain,we _ the picnic yesterday.A were not; could have hadB were not; could haveC had not been; could have had
请问could not have done/might not have done可用于虚拟语气中吗
May not have done 是表示可能不还是不可能 那Could not have done呢
1should not have done 2 could not have done 3 would not have done 有什么区别
谁知道 Download failed because the谁知道 Download failed because the resources could not found 求答.
could never have done和could not do有什么区别
lily could not have accepted the invitation-----?为什么用has she 不是could she
情态动词加上完成时的意思?could not have done must not have done should not have done would not have done 以及它们的用法?
【高一英语】If it____for the snow,we____the mountain yesterday.A.were not ;could have climbedB.were not ;could climbC.had not been ;could have climbedD.had not been ;could climb答案:CA为什么不对呢?
谁知道I be afraid not have you的中文意思