翻译 He must have fallen sick,for he is absent today

问题描述:

翻译 He must have fallen sick,for he is absent today

这里的must + have 表示对过去的事情的一种肯定的猜测,他肯定是生病了,因为他今天没来.象这种用法非常多,比如说it must have rained last night,because the ground is wet.