Picture a small child saying: "Can’t, shan’t, won’t!" They are using modal verbs to show their feelings and attitude to something. Maybe they are refusing to go to bed or eat their peas. Modal verbs ...

情态动词有must, can, may, need, dare, ought(to), should等。情态动词和一般助动词的区别是情态动词有一定词义,它和另一动词构成谓语。考生尤其要注意情态动词接不定式的完成式和其他一些特殊的用法。 例1: Mary my letter; otherwise she would have replied before now. [注释] "couldn't+ ...