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can't have done
couldn
't
have
done
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/...
mustn't
have
done
和
can't
have done的区别最好有例子
答:
首先
have
done
表示已经做过,这点就不用谈了.
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...
有mustn't
have
done
这种形式吗?与
can't
have done啥区别。
答:
首先
have
done
表示已经做过,这点就不用谈了。
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...
英语中存在mustn
't
have
done
的形式吗
答:
楼主,您好 详细点就是说:1)mustn't
have
done
可意为“本不必”,即已经做了某事,而实际上不必要 2)首先have done表示已经做过,这点就不用谈了。
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 somewhe...
could/
can
have
done
在肯定句都可以翻译成什么,在否定句中都可以翻译...
答:
If you
had
helped, I could
have
finished the work.意思:你要是帮了我,我可能已经完成工作了。
can
have
done
则不能用于肯定句中,一般用于疑问句和否定句中,如:
Can
they have passed the exam? 难道他们真通过考试了?He can’t have been to the city. 他不可能去过那个城市。
couldn
't
have
done
的用法是什么
答:
couldn't
have
done
和
can't
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
done
什么意思?
答:
couldn't
have
done
和
can't
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 ...
could
have
done
和might have done的区别是什么?
答:
注意:其否定形式 couldn't
have
done
没有虚拟语气的用法,couldn't have done 只能表推测,相当于
can't
have done,意为:“过去不可能做了某事。”I think that he couldn't have gone abroad. I saw him just now.我认为他不可能出国了。我刚才还看见他了。might have done might (不能...
...
can
与may,could、might、may、would/+
have
done
的区别
答:
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 have gone to Beijing, for I saw him in the library just now. 史密斯先生不可能去北京了,我刚才还在图书馆见过他。2. Mary can't have stolen your money. She
has
gone home. 玛丽...
could
have
done
和 might have done 的区别
答:
注意:其否定形式 couldn't
have
done
没有虚拟语气的用法,couldn't have done 只能表推测,相当于
can't
have done,意为:“过去不可能做了某事。”I think that he couldn't have gone abroad. I saw him just now.我认为他不可能出国了。我刚才还看见他了。might have done might (不能...
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