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can have done
can
have
done
和could have done的区别是什么?
答:
can
have
done
和could have done有区别。can't have done和couldn't have done有区别。1.can+have+done表示对过去行为的怀疑,用于疑问句,译成“可能做过……吗?“2.could+have+done是虚拟语气,表示对过去事情的假设,意思是本来能够做某事而没有做。3.could (不能用 can) have done “表示“过...
can
have
done
是什么意思 用于什么情况???
答:
can
have
done
通常只用于疑问句和否定句;用于疑问句时表怀疑,用于否定句时表不确定。例如:
Can
they have left so soon?难道他们这么快就走了?(表怀疑)He can’t have been to that town.他不可能去过那座城市。(表不确定)<><><> could have done 可用于肯定句、疑问句和否定句;用于...
can
have
done
什么意思
答:
意思是 本来能做到的(但事实却没做到)例句: i'am sorry that you didn't pass the exam.You
can have
passed it.(我很遗憾你没能通过这次考试,你本来是能过关的!)
情态动词
have
done
是什么用法
答:
can
have
done
用于对过去动作的推测,表示“可能”,常用于否定句和疑问句。She can't have gone to work. It's Sunday.她不可能去上班,今天是星期日。She is two hours late. What can have happened?她已经晚了两个小时,可能会发生什么事情呢?-
Do
you think our basketballers played very w...
can
可以用现在完成任时吗
答:
could
have
done
可用于肯定句、疑问句和否定句。用于肯定句既可以表示过去能够做而实际未做,有惋惜、遗憾或委婉批评之意,也可以表示对过去动作的推测;用于否定句和疑问句的情况与
can
have done相同。例如:You could have done better, but you didn't try your best.你本可以做得更好,但是你...
must
have
done
,
can
have done
答:
must
have
done
一定做过某事(表示对过去发生的事的肯定推测)
can
have done 可能做过某事(表示对过去发生的事的不确定的推测)如:He must have been there yesterday.他昨天肯定去过那儿。He can have been there yesterday.他昨天可能去过那儿。
情态动词
have
done
的用法有哪些?
答:
1、“must+
have
+
done
”表示对过去事情的肯定推测,译成“一定做过某事”,该结构只用于肯定句。You must have been mad to speak to the servant.你和仆人说话,一定是发疯了。2、“
can
't+have+done”表示对过去事情的否定推测,译成“不可能做过某事”。Mary can't have stolen your money.She...
can
have
done
可以用在过去的语境中并表示对“过去的过去”的推测吗...
答:
1. It must
have
rained last night, for the ground is wet. 昨晚一定下雨了,因为地面还是湿的。2. You must have been mad to speak to the servant. 你和仆人说话,一定是发疯了。二、 “
can
't+have+
done
”表示对过去事情的否定推测,译成“不可能做过某事”。1. Mr. Smith can't ...
can
have
done
和could have done 的区别
答:
can
't
have
done
表不可能(表推测,不相信)【例句】No, no, he can't have done that. No, no, this couldn't be true.不,不,他不可能干过那件事。不,不,这不可能是事实。(不相信)can have done可能(表推测)【例句】He can have done his homework.(说话者猜测)他可能已经...
can
have
done
和 could have done有什么区别?
答:
could 委婉一些,更常用一些 could
have
done
还表示虚拟语气,与过去事实相反
can
have done 表示对过去某事的推测,“可能已经做某事”
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