摘要:没有人称和数的变化.2. 有些情态动词有过去式的变化:e.g. will → would , can → could , may→ might , dare → dared2 情态动词的否定式: 情态动词+ not +动词原形can not: can't , must not: mustn't , need not : needn't3 情态动词的用法及相互区别, 是考试的内容之一.

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