情态动词常用的情态动词can（could）may（might）shall（should）will（would）mustdare（dared）needhavetooughttobeabletousedtoThefeatures（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的用法1. Ican/amabletoswim.2.
