Question

高中英语单选

________ the incident have happened last term? --- No. At the very beginning of this term as much as I could remember.
A. Should B. Might C. Must D. Could
为什么选D?什么意思？

Answer 1

should have done,must have done都表示该做的没做,是虚拟语气,用于表达与过去的事实相反.但should have done语气上没有must have done重.它们有细微的差别.给你2个句子比较一下:
1)You should not have told him such a bad news when he was ill.
2)You mustn't have told him such a bad news when he was ill.
这2句话翻译过来可以是一样的,但是第1句的含义是,虽然你这么做错了,但是说话者并没有责怪你,责备你的意思,只是叫你注意,以后可不能这么做了.
而第2句话就可以是在责备你为什么要这么做,设想,如果说话者本来平时就和你关系不太好,第2句话甚至可以可以让你难堪,下不了台,对你进行报复.
另外must have done表意较肯定，可翻译为“一定……”而might have done 表意较怀疑，可译为“也许……，已经……”
总之,细微的差别就在语气之中.虚拟语气是英语学习的重难点,多加油哦!