初中英语人教版九年级Section A Grammar focus 4a—4c 9

1、Unit5 被动语态(一)一般现在时的被动语态语态是用来表示主语和谓语之间的关系。英语中有两种语态，一种是主动语态，表示主语是动作的执行者；另一种是被动语态，表示主语是动作的承受者。试比较下面的例句：1. The English teacher often praises Lisa for her excellent work.(该句为主动语态，主语the English teacher是动作praise的执行者，宾语Lisa是动作praise的承受者。)2. Lisa is often praised for her excellent work by the English teacher

2、.(该句为被动语态，主语Lisa是动作praise的承受者，动作的执行者the English teacher由介词by引出。)被动语态通常由“助动词be+及物动词的过去分词”构成，主要用于以下几种情况：1.强调动作的承受者。如：The English-Chinese dictionary is used by most students.2.不知道动作的执行者。如：The book was published (出版) last year.3.没有必要提及执行者。如：Such things are not done twice.4.被动语态的使用往往受上下文和语境支配。在一个句子中有时为了避

3、免中途变更主语而不得不使用被动语态。如：Jack played Mike at ping-pong and (Jack) was easily beaten.5.有些动词习惯上常用被动语态。如：Tim is thought to be the best student in our class.被动语态可用于多种时态，本单元我们先学习一般现在时的被动语态。一、一般现在时被动语态的构成：be (am / is / are) +及物动词的过去分词如：The book is written in Chinese.The book isnt written in Chinese.Is the book

4、 written in Chinese?Yes, it is. / No, it isnt.What language is the book written in?二、如何将主动句(含“主+谓+宾”句型的句子)变为被动句主动句： John helps me.被动句： I am helped by John.这一基本句型变为被动句时，先将主动句中的宾语变成被动句中的主语(宾语如为人称代词，须将宾格变为主格)，然后根据这个主语选用相应的助动词be (am / is /are)，然后将主动句中的谓语动词变成它的过去分词形式，再将主动句中的主语置于介词by之后(如为人称代词，须将主格变为宾格)，最后

5、将句中的其他成分加上即可。【运用】.改为被动语态。1. My parents grow vegetables every spring._2. Does Linda water the flower every day?_3. My uncle keeps a cat and a dog._.单项选择。1. Claudia, are you going to Jeff s birthday party on Saturday? (2014湖北黄冈)Unless I _.A. will be invited B. am invitedC. was inviting D. invited2. Th

6、e pet dog is warm and loving. It _ as a daughter of my family.(2014河北)A. treats B. treatedC. is treated D. was treated3. Every day, too much water _ in our school. We should save it. (2014陕西)A. is wasted B. wastesC. was wasted D. wasted4. Good news! Self-driving cars will come into use in one or two years. (2014湖北宜昌)Really? Were expecting to see how they _.A. are making B. are madeC. make D. will make答案. 1. Vegetables are grown by my parents ever