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canhavedone的例句
can have done的
区别是什么?
答:
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“过去本能够做某事却未做。”注意:其否定形式 couldn't have done 没有虚拟语气的用法。4...
can have done
是什么意思 用于什么情况???
答:
cannot have done 的语气较 couldn’t have done 强一些。例如:
He can’t have been to that town.他不可能去过那座城市
。(表不确定,语气略强)The measurement couldn’t have been wrong.测量不可能出错了吧。(表不确定,语气稍弱)...
can have done
什么意思?
答:
Can
I
have
the laundry
done
today?今天能把我的衣服洗了吗?
must have done ,
can have done
答:
He
can have
been there yesterday.他昨天可能去过那儿。
the meaning of "
can have done
"?
答:
can表示可能,have done表示过去完成 也就是,可能在过去已经完成的。例如,
If I were him,I could have finished all the work.如果我是他
,我早就做完所有工作了。It can have been destroyed since 1940s.可能20世纪40年代它就已经被毁坏了。
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:
could have done表肯定时,用在虚拟语气中,意思是”可能已经...“ 过去完成时,表示过去本能做完却又未做完的事,如: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 ...
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...
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...
couldn't
have done
和
can
't have done 怎么区分?分别用在什么情况下...
答:
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't have known this. 假如别人不告诉我,我就不会知道这件事。
can
't与couldn't 的用法
答:
在请求语句里面couldn't比
can
't较委婉在一般语句里面couldn't表过去时can't表现在时\r\n1,can could 都是情态动词,其后都加动词原形,can't couldn't 也一样,都加动词原形\r\n2,同时could 是can 的过去式,二者又可表示具备"能力", can指现在具备的能力,could指过去具备的能力 ...
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