专题17 情态动词和虚拟语气-备战2021年高考英语基础语法专项训练

专题17情态动词和虚拟语气的基本用法 一、综述： 1. 情态动词，如果没有时态的变化，所有的情态动词都暗示的是“将来时”。 You need prepare a long speech. 您需要准备个很长的演讲。 You ought to be here by 12 December. 你应该在12月12日前到这。 I’d rather stay at home. (would rather) 我乐意待在家里。 I’d like to have a rest. (would like, should like) 我想休息一下。 You’d better do something. ( had better) 你最好做点什么。 2. 如果是站在现在的角度去的描述过去有可能会发生的事情，必须要用情态动词加完成体。 ------We didn't see him at the lecture yesterday. 我们昨天没看见他参加讲座。 ------He couldn’t have attended it. 他昨天不可能参加。 The watch you gave me is wonderful. You couldn’t have given me a better gift than that! 您送我的表太好了。您送给了我最棒的礼物！（您不可能送给我比这更好的礼物了!） 3. 某些情态动词的过去式不表示过去时，而表达一种委婉的语气。 What would you like to drink? 您想喝点什么？ We might as well have another talk with him next Monday.我们不妨下周一再和他谈一次。 二、常用情态动词字典搬家 can, may, must, shall, should(ought to), dare, have to, will, used to, need, would like to, please, had better, would rather Can 1)表示能力：Two eyes can see more than one. A bli