must have been是什么意思

“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...


must have been和must be的区别要口诀,简短,易懂...

must have been 和 must be的区别在 havehave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...


must have been和must be的区别在哪里?

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...


must have been是什么时态?

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...


must have been是对过去正在进行的事肯定?还是对过去的事进...

同理,must have been v+ing 表达对过去某一段时间里持续发生的动作一个肯定的判断。例:He must have been sleeping when the...


must have been的用法和意思

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 have been为什么说是一般过去式的推测形态

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...


关于must have been的用法must have been用法是作对...

现在must have done都是表推测,要表达“本应”的含义都用should/could have done.


must have been与must have done的区别?

其实两者在时态都没有什么区别,都是表示过去一定做过某事~但是~must have been强调的是状态must have done强调的是动作~


must have been(表示对过去的事情进行推测),怎样讲学生...

have done 表示对过去事情的肯定的推测,在句子当中要有事实依据的,Eg:the ground is wet. it must have rained yesterday....


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