Unit 4 Exploring literature Grammar and Usage 学案-2022-2023学年高中英语牛津译林版（2020）必修第二册

B2 Unit 4 Grammar 情态动词 学案 1. 情态动词定义： 本身具有一定含义，通常与动词原形一起构成谓语（情态动词不可单独充当谓语），表示说话人的看法或主观设想。 2. 常见的情态动词： can, could, may, might, must, ought to, shall, should, will 和 would。共10个。具有情态动词特征的词还有：dare, need, have to 和 used to。（兼具情态动词和实义动词（直接做谓语）两种身份） 3. 用法： 表示能力 can、could 表示必要性 must、need、have to 表示许可 can、could、may、might 表示可能性（推测） can、could、may、might、must 表示义务或建议 should、ought to 表示习惯性动作 will、would、used to 表示意愿 will、would 表示请求 will、would 表示建议或征求意见 shall, 疑问句中 表示承诺或要求 shall, 陈述句中 表示规定 shall, 用于正式文件、法律、规章制度中 练习： 一、单项选择 1.—Have you checked the engine? —Yes, I did twice; there　　　be anything wrong with the car. A. won’t           B. mustn’t         C. needn’t         D. shouldn’t 2. The doctor recommended that you 　　　swim after eating a large meal.  A. wouldn’t B. couldn’t C. needn’t D. shouldn’t 3. The missing children haven’t been found yet. Something terrible ________ to them. A. may happen     B. should have happened C. must happen      D. might have happened 4. I don’t know how he _______that I’m lazy, _______he’s been in bed all day.        A. dare to say, that        B. dares say, while   C. dare say, as           D. dares to say, when 5. The school rules state that no child ____________ be allowed out of the school during the day, unless accompanied by an adult.    A. could                B. shall                      C. might                    D. should 6. The famous writer often says that he ________ so much without the support and encouragement from his wife. A. shouldn’t achieve B. shouldn’t have achieved C. couldn’t achieve D. couldn’t have achieved 7. —Did you lock the door？ —No, I ____, but I forgot.       A. should        B. must have        C. must          D. should have C. wouldn’t have enjoyed; before D. shouldn’t have enjoyed; before 二、 用所学的情态动词的肯定式或否定式完成句子 1. A left luggage office is a place where bags __________ be left for a short tim