must 勿百度 must be 不是表示推测吗 表过去的推测 用must have done / must have
must 勿百度 must be 不是表示推测吗 表过去的推测 用must have done / must have been doing 那请看这句话Your sister will be here in less than an hour and we must be at the station to meet her.We are late already.’ “再有不到一个小时你姐姐就要到这儿了,我们得去车站接她.现在就已经晚了.这里也must be也没表示出推测啊