这句话时态不对吧?they must have been several hundred people present
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这句话时态不对吧?
they must have been several hundred people present just before the show began.
后面那句是过去时,但是前面那句是现在完成时,连着现在的,怎么可能before?
they must have been several hundred people present just before the show began.
后面那句是过去时,但是前面那句是现在完成时,连着现在的,怎么可能before?
我觉得没错(除了they应该是There),对过去事实的判断,用must have done应该是符合语法的,虽然事情是以前的,但“判断”这个动作是说话的时候做的,“一定有几百人是在展会开始之前到场的”.站在现在的角度对展会开始之前的情况作判断,能理解吧?
再问: 你画一个时间轴。 (现在)一定有几百人了在展会开始(过去)之前。现在在过去之前?
再答: 这个上面不太好画图,这样说吧: 动词用什么时态,要看它的主语处在什么时候做的这件事,对吧?虽然几百人到会这件事是发生在过去的,但“must”(肯定)这个动作是说话时做的,也就是一个判断的动作(姑且把判断也理解为一个动作),所以不用变(其实must 也没有过去式),但由于判断的事在过去,所以不说must be,而说must have been。这个是有点绕,我举个简单点的例子吧: I believe that he killed her. 你不觉得有错吧? I believe that he had killed her before you arrived here. 也没错吧? 两句说的都是过去的事,但判断都是做的,所以主句动词believe不用变。
再问: 你画一个时间轴。 (现在)一定有几百人了在展会开始(过去)之前。现在在过去之前?
再答: 这个上面不太好画图,这样说吧: 动词用什么时态,要看它的主语处在什么时候做的这件事,对吧?虽然几百人到会这件事是发生在过去的,但“must”(肯定)这个动作是说话时做的,也就是一个判断的动作(姑且把判断也理解为一个动作),所以不用变(其实must 也没有过去式),但由于判断的事在过去,所以不说must be,而说must have been。这个是有点绕,我举个简单点的例子吧: I believe that he killed her. 你不觉得有错吧? I believe that he had killed her before you arrived here. 也没错吧? 两句说的都是过去的事,但判断都是做的,所以主句动词believe不用变。
这句话时态不对吧?they must have been several hundred people present
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