1. Something terrible must have happened if Li Chang was not coming to eat in his restaurant as he always did. (P10)
must have done 表示對發(fā)生在過去的事情的肯定的推測。如:
The classroom is empty. I think they must have gone to the library. 教室空了,我想他們一定去圖書館了。
The ground is wet. It must have rained last night. 地面濕了,昨天夜里一定是下雨了。
【拓展】 must do / be 是對現(xiàn)在或?qū)淼氖虑楸硎就茰y;而must be doing則是對正在進行的事情表示推測。如:
Don’t call him. He must be sleeping at the moment. 別給他打電話了,此刻他一定正在睡覺。
Though I’ve never seen you before, I guess you must be the new secretary. 我以前沒見過你,但我猜你一定是新來的秘書。