unit7Grammarfocus含情态动词的被动态介绍.ppt

Sample Dialogue 1 A: Members should be allowed to use dictionaries. B: Yes, but they should only use English-English dictionaries. Members are allowed to use English-English dictionaries. A: Members shouldn’t be allowed to speak Chinese. B: I agree. Only in this way can you improve your English. Sample Dialogue 2 Young trees should ________ every year. A. be planted B. planted C. plant Ⅱ. 按要求完成下列各句每空一词含缩写。 1. We must do the work right now. (改为被动语态) _______ _______ _______ _______ _______ right now. A The work must be done Ⅰ. 选择最佳答案。 2. Teenagers should be allowed to go out with their friends on school nights. (改为否定句 ) Teenagers _______ _______ _______ to go out with their friends on school nights. 3. A book should be read each month. (改为一般疑问句) _______ _______ _______ _______ _______ each month? shouldn’t be allowed Should a book be read ?1. Their work must ____________ (finish) by four o’clock. 2. Your homework should __________ (do) by yourself. 3. These books mustn’t __________ (take) out of the reading room. 4. Should these food _________ (keep) dry? be finished be done be taken be kept III. 用所给词的适当形式填空。 IV. 句型转换 1. You should make up the bed every day. (改为被动语态) The bed _______ _______ _______ up every day. 2. We can’t see stars in the day time. (改为被动语态) Stars _______ _______ _______ in the day time. 3. You must return the book on time. (改为被动语态的一般疑问句形式) _______ the book _______ _______ on time? should be made can’t be seen Must be returned 【2011天津】39. Today a lot of information can _______ online. A. receive B. be received C. is received D. receiving 答案：B 【解析】 被动语态。今天有很多信息能在网上收到，信息被收到要用被动语态。含有情态动词的被动语态的构成：情态动词+be +过去分词。 【2011浙江金华】22.?— Must we clean the classroom now? — No, you neednt. It?______ after school. A. may clean????? B. must clean??? C. need