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can't have done
can't
have
done
是什么意思?
答:
can't
have
done
(不可能做过)是must have done(一定做过)的否定形式。couldn't have done(可能没做过)是may have done(有可能做过)的否定形式。一般认为can't have done有80%以上的把握.而couldn't have done则委婉的多,只有50%左右的把握.must do /can't do一定,肯定80%把握。may/cou...
can't
have
done
是什么意思?
答:
首先我们来看下
can't
have
done
和couldn't have done的大致意思:can't have done:词性为短语,can't(can not):不能;have:已经(助动词);done(do的过去分词):做过 couldn't have done:词性为短语,couldn't(could not):不能;have:已经(助动词);done(do的过去分词):做过...
can't
have
done
和couldn‘t have done 的区别
答:
have
done
都表示不可能,是对过去情况的推测。例句:he
can't
/ couldn't have worked out the problem.他不可能解决了这个难题。can't 也可以用于对现在情况推测,couldn't have done可以用 和过去事实相反的虚拟语气。例如:if you hadn't gone to the party,you couldn't have met your future...
mustn't
have
done
和
can't
have done的区别最好有例子
答:
can't have done:(1) 其实,是
must have done
的否定形式!也就是说,通常不说 mustn't ...(2) 表示推测,比较肯定,是说话人根据对某人某事平常的了解,不可能发生。He can't have done that for he is not that kind of man. 跟读 他不可能这么做的,因为他不是那种人。
couldn't
have
done
和
can't
have done 怎么区分?分别用在什么情况下...
答:
can
't
have
done
(过去一定没做...),是对过去推测的否定形式。例如: I saw her just now,she can't have gone to Beijing. 我刚才看见她的,她不可能去了北京。couldn't have done是虚拟语气,表达与过去的事实相反。例如: If I hadn't been told,I couldn&...
can't
have
done
的用法
答:
He
can't
have
taken it home.他不可能把它带回家了。(表不可能)could have
done
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 ...
can't
have
done
和 couldn't have done 有什么区别?能举例说明一下吗...
答:
她们两个表示不可能的时候,是同样的意思,只是
can't
have
done
表示的事情更接近于说话时而已,比如 can u look at my article, i'm quite sure i can't have found any bugs.can't have done 还有另外一个意思就是表示 允许,责任之类的否定意思,couldn't have done 没有这个意思。相当...
mustn't
have
done
和
can't
have done的区别最好有例子
答:
can't
have
done
表示以前不可能做某事.例句 ---Where___Margaret have put the empty bottles?---She___them away.They must be somewhere.A.can;can't have thrown B.must;must have thrown.C.must;needn't D.can;must throw 答案为A.第一个句子是一个疑问句而且表示可能性的推测,所以...
can't
have
been和can' have
done
有什么区别
答:
can t
have
done
表否定推断,推测肯定没做。 The measurement couldn t have been wrong. 测量不可能出错了。 He can t have been to that town. 他根本不可能去过那座城市。 He
can't
have taken it home. 他不 “can’t have done”表否定推断,推测肯定没做。<><><> The measurement...
must
have
done
,must do,
can't
have done,can't do的区别
答:
must
have
done
对过去发生的动作很有把握的肯定推测 must do“必须做”,含有一种命令的口吻,语气强
can't
have done对过去发生的动作很有把握的否定推测,意为“不可能做了”can't do“不能做”表示不给予许可,语气没有must do强
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