高一英语必修2第四单元语法PPT课件

1、1,Unit 4 -Wildlife Protection,Period 4: Grammar Present Progressive Passive Voice 现在进行时的被动语态,2,The Tense of the The Passive Voice,1. Present passive voice: am/is/are + p.p. The Olympic Games are usually held in big cities. 2. Past passive voice: was/were+ p.p. The last Olympic Games were held in Ath

2、ens,3,3. Future passive voice: will/shall+ be+ p.p. The 2008 Olympic Games will be held in Beijing. am/is/are+ going to be+ p.p. The 29th Olympic Games are going to be held in Beijing in 2008,4,am/is/are+ to be+ p.p. The 29th Olympic Games are to be held in Beijing in 2008. 4. Perfect passive voice:

3、 have /has+ been + p.p. The Olympic Games have been held 28 times,5,5. Present continuous passive voice: am/is/are+ being+ p.p. -Why it is so noisy out there? -Oh, its because the road is being repaired,6,Complete the sentences according to the text. 1. We _for the wool beneath our stomachs. (Line 9

4、) 2. Our fur _to make sweaters for people like you. (L10) 3. I wonder what _to help you. (L12) 4. So good things _here to save local wildlife. (L25,are being killed,is being used,is being done,are being done,1. Discover what structure is used,what structure is used,7,Summary: 现在进行时的被动语态,e.g. 1. A ne

5、w library is being built now. 2. Some animals are not being protected well enough. 3. Is the bridge being repaired now,1. 构成,am/is/are (not) + being + V-过去分词,2. 意义,正在被做,定义,现在进行时被动语态表示说话时或现阶段某个被动的动作正在进行,8,现在进行时的被动语态基本用法： 表示现在正在进行的被动动作。 eg,Mary is being interviewed now,9,Some cultural relics are being

6、 appreciated by experts,10,He _(bite) by a mosquito,is being bitten,11,2. 表现阶段正在进行的被动动作,The effect of the new drug is being studied at present by scientist,12,The habitat of the panda is being protected by the local people,13,The habitat of the panda is being protected by the local people,14,3. 少数及物

7、动词的进行时表示按计划、安排将要承受某个动作。 An party is being held tonight. 今晚将要举办一场晚会,Afolksongisbeingsungnext,下面将唱一首民歌,15,4. be + under / in + V.可代替进行时被动语态,e.g. The bridge is under repair. The bridge is being repaired. e.g. The telephone is in use (=is being used) now,16,如果去掉being,就成为一般现在时被动语态或系表结构。试比较下列句子,Look!Thech

8、ildrenarebeingtakencareofby their aunt. 瞧!孩子们现在正由姑姑照看着。(指现在的情况) Childrenaretakengoodcareofatschool. 孩子们在学校被照看得很好。(指通常的情况,17,e.g: 1. They are building a new library now. 被动,A new library is being built now,Many animals are not being protected well enough,Is the bridge being repaired now,2. Many anima

9、ls are being protected well enough. 否定句,3. The bridge is being repaired now. 疑问句,18,A huge Christmas tree _ (decorate,is being decorated,19,Christmas presents _(send) to children,are being sent,20,Many Christmas presents _ (buy) by my parents,are being bought,21,A wonderful Christmas feast _ (enjoy)

10、 by my families,is being enjoyed,22,典型例题,A new cinema_ here. They hope to finish it next month. （2001 北京春季卷） A. will be built B. is built C. has been built D. is being built 2. I have to go to work by taxi because my car _ at the garage. (2006重庆卷) A. will be repaired B. is repaired C. is being repaired D. has been repaired,23,3. -Have you moved into the new house? -Not yet. The rooms _. A. are being painting B. are painting C. are painted D. are being painted,24,4Rainforests _ and burned at such a speed that they will disappear from the earth i