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must have done否定
must
have
done 否定
是 need not have done吗。???
答:
must have done的否定形式是can't have done.用must来表示肯定、猜测
;用can't 来表示动作不可能发生,如:- that must be wrong.- No, it can't be wrong.过去式举例:He walked past me without speaking. He can't have seen me.couldn't have...可以替代can't have......
must
have
done 否定
是什么? 没有must not have done?用什么?
答:
没有must not have done, 表示对过去事情肯定的推测用must have done,
否定的推测只能用can't/couldn't have done
.
用
must
have
done
造
否定
句
答:
He
must
have
done
homework.
mustnt
have
done
与cant have done区别
答:
一、cant have done 是 must have done
对过去推断的否定形式
。二、具体说明如下:情态动词 must (必定、一定)”表示推断或指具有较大的可能性时,其否定式是 can't/cannot (不一定、不可能)。1. 对现在的推断 肯定 —— must + be, 如:You must be very tired. 你一定很累了。否定 —...
must
后面的动词怎么用?
答:
1.must have
done.表示对过去某事的肯定猜测,其否定或疑问形式都用can/could来表示
。例如:since the road is wet,it must have rained last night.2;当然对现在发生或者将来发生的事情,要用must do表示猜测,否定为can’t do he must understand that we mean business.you must be hungry ...
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。
can't
have
done
...的
否定
形式是什么?
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/...
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
在英语虚拟语气语法中
must
have
done
有没有
否定
式用法
答:
其本身的意思是 推测某人过去一定做过某事 要想表达和其相反的意思 应用 can/couid not
have
done
因为
must
not 表示禁止的意思 希望能帮到你 呵呵
mast
have
done
是虚拟语气吗?
答:
不是虚拟语气,而是“情态动词+have+过去分词”结构,表示对已发生的动作或状态的情态。must have done肯定已经(表示推测)He must have finihshed the work.他肯定已经工作做完了。类似结构:He
can't have done
the work.(must have done的否定形式)...
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