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must have been
must
have
been
是什么时态?
答:
must have been
prosperous:这个是情态动词的过去式,由于情态动词没有过去式,因此用must+have+been表示过去,即过去一定很繁荣。must be不一定是系动词,后面加doing是现在进行时。must have been 本身可以是现在完成时,后面加doing是现在完成进行时。
must
be和must
have
been
有什么区别
答:
must
have
been
和must be的区别在have。因为本句是指对过去情况的推测,所以必须要用“情态动词+动词的完成式”。have在这里表示是动作已经完成。所以must have been是对过去的事实的肯定猜测,must be是对现在事实的肯定猜测。例句:Sorry I made such a fool of myself last night. I must have ...
must
have
been
是什么意思
答:
“当时一定是...”此句型用于表示对过去发生的事情的推测。如 He
must have been
Swedish. 他当时一定是瑞典人。希望我的回答能够帮到你,望采纳!祝你学习进步,天天快乐。O(∩_∩)O
must
have
been
为什么说是一般过去式的推测形态
答:
must
+have+过去分词,表示对过去情况的推测。而must+原形动词,表示对现在情况的推测。汉语都是译成"一定⋯"。以上是需要记的,无原因好说。
must
have
been
和must be的区别
答:
must
have
been
和 must be的区别在 have have在这里表示是 动作已经完成。所以 must have been是对过去的事实的肯定猜测 must be是对现在事实的肯定猜测 e.g.She sings so well.I think she must have been a singer.她唱得真好。我想她以前肯定是名歌手。he doesn't come to school today....
must
have
been
的用法和意思
答:
Must
have
been
当时一定是,表示对过去某一时刻内动作的猜测,否定can't have been当时不可能是
must
be
和must
have
be有什么区别
答:
must
be和must
have
be的区别主要是:must have
been
表示对过去情况作推测;must be表示所对现在情况的推测。例如:1、He must be ill.他一定是病了。(指现在有病)2、He must have been ill.他当时一定是有病 / 他一定生过病。(指过去有病)3、He must be very rich.他一定非常富有。(...
had
to 与
must
have
been
的区别
答:
Had
to 是
have
to 的过去时,表示不得不怎么样。例如:我不得不去学校上课--I
had
to go to school;
Must
have
been
表示非常确定...,如果后面接done,就是你肯定被怎么了,例如:你一定被骗了--you
must
have been cheated;如果后面接形容词,就表示你一定是怎么了,比如:你一定是疯了-...
为什么第一题can't
have
been
不行?第二题
must
have been 不行...
答:
must
have
been
表示对过去时间发生的动作或存在的情况的推测,一般用于肯定句.例如:She must have been in the library, I saw her there just now.她肯定在图书馆,刚才我在那儿见她了。can't have been 表示对过去发生事情的“不肯定”,常用于否定句和疑问句.例如:He can't have been to ...
must
have
been
,must have been done,must have done三者的区别?_百度...
答:
must
have
been
一定是已经xxx(做某件事)must have been done 一定是已经完成了 must have done一定完成 been指“被”,有been的句子就是被动句,某个动作被进行的意思。
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must have been和must be
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have什么情况要加been
has been用法总结