高中英语could have done 只表示过去可以做而未做,可是could have been却可以表示对过去的推测、.还有类似的情况吗?比如should have been,should have done 都表示过去应该做而未做
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高中英语中might have done 和could have done
could never have done
could not have done
高中英语中can与may,could、might、may、would/+have done 的区别
Could have done would have done should have done
could have been done ,could have
could never have done 造句
how could you have done
would have done,might have done,could have done,should have done分别表示什么意思?
should have done ,shouldn't have done.could have done,couldn't have done
could have done和need have
could have done和would have done的区别
should have done和could have done的区别?
英语:should have done与could have done区别?
could have done 和 might have done 的区别
I could have done without 怎么翻译?
求could 、should have done的用法.
should have done ;could have done; might have done 有什么区别