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和must have been doing的区别
must have +done must have+ been doing 都知道be doing 表示正在进行的动作,正在发生的,那要放到must have done里面去,则要符合“done”的这中过去分词的形式,则就变成了must have+been doing 拉,有一直发生的意思,整个意思就是“表示对过去一直发生的事情的推测”.如：Tom must have been playing...
must have done与must have been doing区别
第一个就是对过去事实推测 must have been doing 其后的be doing 表示进行 我们知道must have done 是对过去 那么must have been doing就是过去进行咯 就可以理解为过去一直发生的事情 举个例子 You must have been driving too fast 你肯定一直在超速 表示过去一直 再举个must have done 的例子...
“must have done”和“must have been doing”的区别是什么?
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。
不是must have been done吗?
must have been done 和 must have been doing 是两个不同的概念。have been done 是现在完成时的被动语态，汉义：＂已经被⋯＂。have been doing 是现在完成进行时，表示动作从过去某一时间开始一直延续到现在。加了must 后可以表示推测。
must have done和must have been doing的区别
当然也有意义上的区别，在一些特定的词语上，如interesting和interested，exciting和excited这类词，ed就表示个人的感情而ing则表示物体的性质 如：interesting game好玩的游戏，ing表示游戏的性质——好玩 excited boy 兴奋的男孩，ed表示男孩的感情 除了这些特定的词，好多动词都可以加 ed,ing的，这并不...
用must be done 和must be doing 造句
you must have completed the job!你一定已经做完了工作了吧？You must be doing the job!你一定还在做那个工作吧
请问高手 MUST have been done
其实must have been done只是must have done的被动形式罢了。我说，你举出来的那几个例子：1那个就是must have been doing的结构是指某动作在过去某时间点开始，一直持续到现在，有继续持续下去的趋向，或者等这句话一说完这个动作就完成；2那个是加形容词 be expensive=很贵，must have been ...
must have been是对过去正在进行的事肯定?还是对过去的事进行肯定?
对过去的事情的肯定，have been 是现在完成时，指已经做了什么，要对正在进行的事表达肯定后面要加doing
you must have been driving at seventy miles an hour为什么要用ing...
must have done 是现在完成时，表示一定做了某件事情，是一种非常肯定的推测 must have been doing 是现在完成进行时 ，表示之前做了某件事后现在还在做那件事，是对过去一段时间的延伸。也就是说，你过去做的某件事对现在造成了影响，并且还在持续造成影响，所以要用doing这种动名词的形式来表达这...
must have been doing
must have been doing意思是 一定一直都在做某事She is so tired .She must has been working all the morning.她很疲劳了她一定工作了一个早上。must have been doing 表示肯定的猜测 并且猜测这种动作,或者行为一直持续到现在 还有must have been done是must have done的被动形式。是对过去发生的...
