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请帮我解释一下“can't/couldn't have done”的意思并造一个句子拜托了各位 谢谢
帮帮忙,谢谢!请帮我解释一下“can't/couldn't have done”的意思并造一个句子
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推荐答案 2015-03-06
没有can't have done it I couldn't have done it without your help. 没有你的帮助,我是完成不了这件事的。
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couldn
'
t
have
done
是什么
意思
?
答:
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 通过下面的表格我们了解
下can
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...
can
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t
have
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和
couldn
‘t have done 的区别
答:
- "can't have done"
的字面意思是“不可能已经做过某事”,它表示主观上持有不可能或不太可能某种行为或事件已经发生的观点
。- "couldn't have done"的字面意思是“不可能已经做过某事”,它强调过去发生的某事已经不可能发生。例句:- I can't have left my keys at home. I remember putting ...
can
'
t
have
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和
couldn
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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
'
t
have
done
和
couldn
‘t have done 的区别
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 ...
can
'
t
have
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和
couldn
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一下
吗...
答:
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
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can
have
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1、
can
have
done 和could have done 的区别 can have done是表示应该做某事而没有做,所以既然知道没有做,那肯定是已经发生了。could have done 表示本能做而实际未做,是虚拟语气.2、can'
t
have done和
couldn
't have
done的
区别 can't have done(不可能做过)是must have done(一定做过)的...
couldn
'
t
have
done
和
can
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答:
can
x27
;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
x27;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&...
couldn
't和
can
'
t的
区别?
答:
can
't/
couldn
't表示推测时,意思是“不可能...”,语气非常坚决的否定推测.根据动作发生的时间,一般分为以下三种情况:1)进行式(对正在发生的事情的否定推测):can't be doing sth 如:It's already ten o'clock.My father can't be sleeping now.2)完成式(对过去的动作的否定推测):can'...
mustn'
t
have
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区别最好有例子
答:
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,所以只能用情态动词can或could,第二句的答语表示对过去的推测,所以用can't have
done
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