情态动词 常用的情态动词 can(could) may(might) shall(should) will(would) must dare(dared) need haveto oughtto beableto usedtoThefeatures(特点)ofthemodalverbs: 1.情态动词本身有词义,但词义不完全. 2.不能单独作谓语,只能和动词原形一起构成谓语 . 3.情态动词没有人称和数的变化(除“have to”). 4.没有不定式、V-ing、V-ed形式. He can/could/must/may/might/shall/ should/need/dare/dared/will/would/ought to/ used to + work in that factory. He has to go home now. He had to look after his sick mother.在情态动词的使用中, 我们要注意以下考点: 1.情态动词的基本用法。 2.情态动词表推测的用法。 3.情态动词+havedone的用法。 1.表“能力” can,could的