作业帮must have been在主句是一般过去式的宾语从句中变为must had been吗 ?两小时内给出答案
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must have been在主句是一般过去式的宾语从句中变为must had been吗 ?两小时内给出答案
很乐意为你解答这个问题!
首先要清楚must,can,should ,may,might 等等情态动词后面动词一定要用原型,也就是说must无论是做“猜测”还是“必须”的意思,后面一定是跟动词原形的.也就是说must have been是正确的说法.而你所提到的must had been是不存在的.我明白你是为了强调是过去的时态,但是在语法中must have been 就可以表示在过去时态下的意义.
例如：I thought he must have been at home last night.就表示：我认为他昨晚一定在家.
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首先要清楚must,can,should ,may,might 等等情态动词后面动词一定要用原型,也就是说must无论是做“猜测”还是“必须”的意思,后面一定是跟动词原形的.也就是说must have been是正确的说法.而你所提到的must had been是不存在的.我明白你是为了强调是过去的时态,但是在语法中must have been 就可以表示在过去时态下的意义.
例如：I thought he must have been at home last night.就表示：我认为他昨晚一定在家.
.
must have been在主句是一般过去式的宾语从句中变为must had been吗 ?两小时内给出答案
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