Unit 2 Wildlife Protection Discovering useful structures语法课课件-2022-2023学年高中英语人教版必修第二册

被动语态 Everybody, everybody wants to love. Everybody, everybody wants to be loved. 语态的种类 英语动词有两种语态： 主动语态 doing the active voice 被动语态 done the passive voice 主动语态 表示主语是动作的发出者 We plant the trees. 动作的发出者 表动作 被动语态 表示主语是动作的承受者 The trees are planted by us. 动作的承受者 表动作 被动语态的构成 主语+be + done be负责时态变化相当于助动词 The flowers are planted by Jim done体现被动，过去分词恒定不变 被动语态的构成 The boy ate my egg. eat-ate-eaten My egg _________ by the boy. was eaten 被动语态的构成 The dog bit the man. bite—bit—bitten The man bit the dog. The man was bitten by the dog. 被动语态的构成 People speak English in Canada speak—spoke—spoken English _________ by people in Canada. is spoken 被动语态的思路 判断句子的时态 判断主语与动词之间的语态关系（即主语是动作的发出者还是承受者，如果主语是动作的发出者则是主动语态。如果主语是动作的承受者则是被动语态） 主语的单复数直接决定be动词的单复数形式。 被动语态的时态 被动语态的时态 被动词be 体现时态 done 一般现在时 am, is, are done 一般过去时 was, were done 一般将来时 will be done 现在进行时 am/is/are being done 现在完成时 have/has been done 过去进行时 was/were being done 过去完成时 had been done 过去将来时 would/should be done 情态动词 can/must/may be done The Present Continuous Passive Voice -- Unit 2 Wildlife Protection -- 现在进行时的被动语态 (3) What measures are being taken to help them? (2) What is being done to help them? (1) African elephants are being hunted. Find out the following sentences in the reading text first, and then underline the present continuous passive voice in the sentences and discuss its function. Hunters are hunting African elephants. What are people doing to help them? What measures are people taking to help them? 定义：表示“某人/事此时此刻正在被…”，主语是动作的承受者, 表示说话时或现阶段某个被动的动作正在进行。 1. 11 被动语态的构成 1. The book was written by Lu Xun. 2. The classrooms are cleaned by students every day. 3. This maths problem can be worked out by little Tom. 被动语态的构成：主语+ be(am/is/was/are/were) +done 2. 结构 1）肯定形式：am/is/are＋being＋过去分词 The house is being painted. 2）否定形式: am/is/are＋not＋being＋过去分词 The trees are not being watered. 3）疑问形式: Am/Is/Are＋主语＋being＋过去分词？ Am I being watched over? 4）特殊疑问句的形式: 把特殊疑问词放在一般疑问句前面。 How many bridges are being built i