精选优质文档-倾情为你奉上情态动词专题情态动词表示说话人的语气和态度。如需要、愿意和怀疑等。它们有一定的词义,但不完整,必须和主要动词的原形一起构成谓语,常用的情态动词有:can, could, may, might, must, have to, ought to, should, will, would, need, dare, shall, , be able to及半情态动词had better, would rather, have to, would like to. 情态动词的基本用法:一、 can 1. 表示能力“能, 会” A computer cant think for itself; it must be told what to do.2. 表示许可,“能够, 可以”;在疑问句中表示请求许可“能不能,要不要,用could表委婉语气,还可以用may。 You can go out to play when you finish your homework. -Can /Could