Unit 7 知识点2022-2023学年人教版九年级英语全册

Unit 7 Teenagers should be allowed to choose their own clothes. 【单元重点语法：带情态动词的被动语态】 1. 含有情态动词的被动语态： 情态动词+ be + 过去分词 例：Teenagers should be allowed to make their own decisions. 2. 否定句：情态动词+ not + be + 过去分词 (即： 情态动词后加not) 例：Teenagers should not be allowed to make their own decisions. 3. 一般疑问句：情态动词 + 主+ be + 过去分词 (即： 情态动词调到句首。回答用情态动词) 例：Should teenagers be allowed to make their own decisions? Yes, they should. No, they shouldn’t 【被动语态总结】 一、被动语态基本结构: be + 过去分词 1. 一般现在时的被动语态: are/ is/am + 过去分词 2. 一般过去时的被动语态: were/ was + 过去分词 3. 带情态动词的被动语态:情态动词 + be +过去分词 4. 一般将来时的被动语态: will be done be (am/is/are) going to be done 例：主--The government is going to build two new bridges here . 被--Two new bridge are going to be built here by the government. 5. 现在进行时的被动语态：be ( am/is/are) being done 6.过去进行时的被动语态：be ( was/were) being done 例：主--They are helping a hurt dog. 被--A hurt dog is being helped by them. 7. 现在完成时的被动语态：have/has been done 例：主--He has eaten all the potato chips. 被-- All the potato chips have been eaten by him. 二、被动语态注意事项： a) 宾补是不带to的动词不定式时，改为被动句时要还原to 例: make sb do sth ---- be made to do sth 不带to不定式做宾补的常见词有make, let, have, see, watch, hear, feel, look, notice, observe(观察) eg： The boss made him work ten hours.(改被动) He was made to work ten hours by the boss. b) 不能变被动的情况： 不及物动词没有被动语态（happen, take place, rise,...） 谓语动词是表示所属的动词时（have, own, belong to, possess...） 宾语是反身代词、相互代词时（each other, one another, yourself,...） c) 主动表被动的情况： 1）.有些及物动词的词，在强调主语的特点、特征及性质时，常用主动形式表达被动意义， 如write, sell, read, wash, wear, cut等，可以与well, easily等副词连用。 My pen writes well. 我的笔很好写。 The cloth washes well. 这个料子耐洗。 2) smell, feel, sound, look, taste等连系动词做谓语时。 这鱼尝起来很美味。 The fish tastes very good. 3) 物+ need/require/want + doing sth 需要做某事 (= 物+ need/require/want + to be done) 房间需要打扫了。 The room need cleaning.(= The room need to be cleaned.) 4) be worth doing sth 值得做某事 这本书值得看。 The book is worth reading. Section A 【P49 1a-1c】 1. allow sb to do sth 允许某人做