22Unit4章节幻灯片.pptVIP

“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 by them. →How many parks are being built? 主动语态变被动语态 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. My car is being repaired now. 2. 表现阶段正在进行的被动动作。 The disease is being studied at present by scientist. The habitat of the panda is being studied at present . 现在正在研究熊猫的生活环境。 3. 少数及物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。 4. 有些动词进行时的主动形式就可以表示被动的意思,常见的这些动词有: print, cook, fry, bake, burn, hang. e.g. The house is burning. The meat is cooking. 5. 在某些 “介词+名词”的短语也可以表示正在进行着的被动,常见的这些介词有: on, under e.g. Many new cars are on show. = Many new cars are being showed. Your questions are under discussion. = Your questions are being discussed. 6. 有些表 “ 状态,　心理活动,　情感”等的动词,常用一般现在时的被动语态表示 “正在进行”。 e.g. You are wanted on the phone. MP3 is becoming more and more popular. In other words, it is loved by more and more people. Practice 1. -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 2. A new cinema _____ here. They hope to finish it next month. A. will be built B. is built C. has been built D. is being built 3. Selecting a mobile phone for personal use is no easy task because technology _____ so rapidly. A. is changing B. has changed C. will have changed D. will change 4. Rainforests _____ and burned at near future. A. cut B. are cut C. are being cut D. had been cut 5. The building _____ now will be our dormitory. A. build B