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must hAvE DonE

must have done一定做过(表示过去做过的事对现在的影响) 例:You must have lied.你一定撒谎了。 must be一定是 表示一般的陈述 例:You must be a student.你一定是个学生。 PS:绝对权威!

must表推测时 must do 和must have done的区别 must表推测时 : 必定,一定 The light is still on, so he must be at home. 灯还是亮的,他一定在家。 The light was out. They must have gone to bed. 灯都熄了,他们必定睡了。 注意:1. must...

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'...

must have done和must have been doing的区别: 您好。两者都是表示肯定的推测。 must have done:是说你肯定做了某事。 must have been doing:译为肯定当时正在做某事,只有意思的区别。

must have done (过去)准是/一定做过某事 must +have +过去分词 表示对过去某种情况的判断

对于上述情况的虚拟语气(条件状语从句中的虚拟语气),只要理解两点,就很容易做题。 条件状语从句虚拟语气,是指“条件”发生的几率非常低,几乎不可能,那么既然条件都已经无法满足,此条件下的后果发生几率更低了,几乎不可能。体现在英语中,...

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 thro...

动词后+ED和动词后+ING 举个例子,I am interested in the book. The book is interesting.一个以人做主语,一个以物做主语。加ed是修饰人的,而加ing则是令人怎样的形容词。加ed成名词我没听说过。加ing是成动名词吧。说的不好你可以看下面的:...

一、 “must+have+done”表示对过去事情的肯定推测,译成“一定做过某事”,该结构只用于肯定句。 1. It must have rained last night, for the ground is wet. 昨晚一定下雨了,因为地面还是湿的。 2. You must have been mad to speak to the serv...

must have done:表示对过去的肯定的逻辑推测,推定某件事情、动作或状态可能在过去发生过(存在过)。He must have been a doctor, for he knows medicine so well.(他过去肯定是一位医生,他对医学如此了解。)Somebody must have stolen the...

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