情态动词 一、情态动词表示说话人的情感态度。它有一定的实在词义(如:能、会、可能、以前、最好、宁愿。。。),只有谓语特性,必须和其他动词一起构成谓语,(一般来说)在各种人称后都用同样的形式。 二、中学阶段常见的情态动词: 情态动词 Can could may might must will would shall should Ought to had better would rather 可用着情态动词 Used to need dare 与情态动词相关的短语 Be able to have to 情态动词的固定谓语结构:情态动词+(不带to)动词不定式形式do 例如: +be done +be doing must +have done +have been done +have been doing 注意:ought (to)和used ( to)例外,动词不定式要带上”to” He can speak 5 languages 他会讲五种语言。 Why did you return the book to me ? You needn’t have done so. 你为什么把书还给我呢?其实你没必要。 |