2014年大学英语四级语法考点概括(4)

　　情态动词

　　1) The phone is ringing, _______________(但是没人接听。她一定不在家).

　　2) I can’t find my sunglasses. _______________(我可能昨天落在咖啡店里了).

　　3) You screamed in your sleep last night. ______________(你一定梦见什么可怕的东西了).

　　4) It’s a pity. _______________(你本应该邀请她来参加你的毕业典礼的).

　　5) _______________(其实我没必要穿上我最好的套装去参加那次聚会的); most of the guests were wearing jeans and sweaters.

　　答案解析：

      1) but there is no answer. She can’t be at home (考点：情态动词可表示可能性，can’t 表示“一定不”)

　　2) I may have left them in the coffee shop yesterday(考点：“情态动词can/could, may/might, must + 完成式”用于表示对过去发生的动作的主观判断)

　　3) You must have dreamed of something terrible (考点：同上)

　　4) You should have invited her to your graduation ceremony (考点：“情态动词should/ought to + have done” 用于评论过去应该做而实际并未做的动作，含有批评的意思)

　　5) I needn’t have put on my best suit to go to the party (考点：“情态动词needn’t + have + done”表示对过去发生的动作进行评论，认为“无须发生”，“不必做”)