题目

According to what he complained about,something must have gone wrong with the computer,______?
According to what he complained about,something must have gone wrong with the computer,_didn't it_____?
这里没有表过去的时间状语,为什么用didn‘t,而且助动词是have,表过去的话,不应是hadn’t吗?

提问时间：2020-08-07

答案

must have gone wrong,其实是虚拟语气,是对过去的一种猜测,但是整体基调还是过去式,accroding to what he complained about就可以看出,something must have gone wrong with the computer这句话是推测,所以用的是虚拟语气,用must have表虚拟,但是didn't it 这段就不是虚拟了,问的是现实.其实意思就是,根据他抱怨的,电脑肯定出问题了（说话者的推测）,不是么（难道事实情况不是如此么?）所以用的是didn't it.
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