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
情态动词+ have +过去分词
1) may(might) have + done sth,can (could) have + done sth 表示过去,推测过去时间里可能发生的事情.
2) must have +done sth,对过去时间里可能发生的事情的推测,语气较强,具有"肯定","谅必"的意思.
3) ought to have done sth,should have done sth
本应该做某事,而事实上并没有做.否定句表示"不该做某事而做了".
“情态动词+have done”表示对过去的判断与推测.
should have been/should have done 属于虚拟语气,表示已经过去的应做但没做,或想做没做的事,或应是怎样的。
could have done/could have been属于虚拟语气,表示已经过去的能是怎样的。
具体的解释应该结合语境,英语没有绝对的意思,提高语感能够帮助理解。...
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should have been/should have done 属于虚拟语气,表示已经过去的应做但没做,或想做没做的事,或应是怎样的。
could have done/could have been属于虚拟语气,表示已经过去的能是怎样的。
具体的解释应该结合语境,英语没有绝对的意思,提高语感能够帮助理解。
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