人教高中英语必修2Unit4 Learning about Language课件 (1)

Unit 4 Wildlife protection Learning about language -----Discovering useful structure What is the Passive Voice? 英语动词有两种语态： 主动语态 (the Active Voice) 被动语态(the Passive Voice) What is it? A. 主动语态表示主语是动作的执行者。 B. 被动语态表示主语是动作的承受者。 We planted the tree. We speak English. 主语 谓语 宾语 English is spoken by us. 主语 谓语 宾语 主动语态 被动语态 We cleaned the classroom yesterday. The classroom was cleaned by us yesterday. the Structure is 助动词be+及物动词的过去分词 be+V.P.P(past participle) be done 主动语态变被动语态口诀： 宾语提前主语变， 原主变宾by后见， 时态人称be关键。 主变被解题步骤: 1. 找宾语 ----即动作的承受者 They make shoes in that factory. Shoes 2. 判断宾语的单复数 ----即be动词的单复数. are were 3. 判断动词的时态 ----即be动词的时态. 4. 修改谓语的时态 ----即原句动词改为过去分词 made 5. 修改原句的主语 ----即by+ 主语(宾格）. by them in that factory. Tom broke the window. The window was broken by Tom. Tom broke the windows. The windows were broken by Tom. He broke the windows. The windows were broken by him. go over To review the simple present ¸ the past tense and the future passive voice. 时态 主动语态 被动语态 一般现在 时 V.(原形)/ V.(e)s am/is/are +V. pp 一般过去 时 V.-ed/ made was/were +V. pp 一般将来 时 will +V.(原形) will+ be +V. pp 一般现在时的被动语态： 1. People play football all over the world. 2. Mr. Green teaches us this term. Football all over the world . We this term. is played by people are taught (by Mr. Green) 一般过去时的被动语态： 4. People built the Great Wall long ago. 5. Two years ago we used the machines to make shoes for children. The Great Wall long ago. Two years ago those machines shoes for children. was built (by people) were used (by us) to make 一般将来时的被动语态： 6. We will write a diary next class. 7. Tom is going to hold a birthday party. A diary next class. A birthday party . will be written (by us) is going to be held by Tom Objective GaoHongwei is being interviewed by ChangYuyu now. 请观察下列句子中的划线部分。 YuanHao’s car is being repaired now. The life of the panda is being studied at present. Grammar 现在进行时的被动语态 The present progressive passive voice 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. 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: How many bridges are being built in the village? “三变”: 原句主语变为by短语, 宾语 变为主语, 谓语由主动变为被动； “三不变”: 原句意思不变, 原句时态 不变, 原句主谓宾以外成分不变。 They are building nine parks. → Nine parks are being built. → How many parks are being built? 主动语态变被动语态: •Susan is cooking dinner. •Dinner is being cooked by Susan. active voice 主动语态 passive voice 被动语态 •They are designing the car. •The car is being designed by them. •You are using our fur to make sweaters. •Our fur is being used to make sweaters. •An excited elephant is watching her. •She is being watched by an excited elephant. are being followed 1. The news _____________ (talk) about everywhere. 2. A lot of tall buildings ____________ (set) up, and people will move in sometime next year. 3. What should you do while you________ _______ (follow) by a stranger? 4. Our fur ____________ (use) to make coats. is being talked 用被动语态的适当形式填空。 are being set is being used 语法填空之被动语态 用所给动词的正确形式填空 1. The boy ________ to get ready the exam tomorrow. （tell） 2. This dictionary mustn’t ________ away from the library. （take） 3. My shoes ___________ . I went out for a new pair. （wear out变旧） 4. We can’t use the bridge now, because it _____________.（repair） 5. The computer ______________ for anybody ,because it isnot work.（use） will be told be taken were worn out is being repaired is not being used • That’s all. • Thank you