1、被動(dòng)語態(tài),被動(dòng)語態(tài)的基本構(gòu)成： be+動(dòng)詞的過去分詞 （be+done),1.一般現(xiàn)在時(shí)am/is/are +done,We clean the classroom every day. The classroom is cleaned by us every day.,He put on a coat. A coat was put on by him.,2.一般過去時(shí)was/were+done,He made the kite. The kite was made by him.,3.一般將來時(shí) shall/will /be going to+ be done,They will plan

2、t trees tomorrow. Trees will be planted by them tomorrow. He is going to write a letter to his mother. A letter is going to be written to his mother by him.,4.現(xiàn)在完成時(shí)has /have +been done,Jim has finished the work. The work has been finished by Jim.,5.含有情態(tài)動(dòng)詞的被動(dòng)語態(tài),can/may/must/should +be done,I can find

3、 him. He can be found by me.,被動(dòng)語態(tài)的用法,1. 不知道動(dòng)作的執(zhí)行者是誰。,這塊手表是中國(guó)制造的。 This watch is made in China.,2. 沒有必要指出動(dòng)作的執(zhí)行者,每年都應(yīng)該種更多的樹。 Many trees should be planted every year.,3. 需要強(qiáng)調(diào)或突出動(dòng)作的承受者。,世界上越來越多的人說漢語。 Chinese is spoken by more and more people in the world.,4. 句子的主語是動(dòng)作的承受者。,許多房屋被沖走了。 Many houses were washe

4、d away by the flood.,主動(dòng)語態(tài)變被動(dòng)語態(tài)的方法,（主語） （賓語） 主動(dòng)語態(tài)：動(dòng)作的執(zhí)行者+謂語動(dòng)詞的主動(dòng)形式+動(dòng)作的承受者 被動(dòng)語態(tài)：動(dòng)作的承受者+謂語動(dòng)詞的被動(dòng)形式+動(dòng)作的執(zhí)行者 （主語） （賓語）,說明： （1）要將主動(dòng)句里的賓語變?yōu)楸粍?dòng)句中的主語，若主動(dòng)句中的賓語為人稱代詞，要將賓格變成主格。 （2）把主動(dòng)句中的主語變?yōu)楸粍?dòng)句中的賓語，主格變賓格，并由by引導(dǎo)。 （3)謂語動(dòng)詞變成相應(yīng)的被動(dòng)形式。,補(bǔ)充部分,1. 主動(dòng)結(jié)構(gòu)表被動(dòng)意義,open，lock，write，read，sell，wash， cut，burn，drive等詞作不及物動(dòng)詞時(shí)，它們的主語為物，可以用

5、主動(dòng)語態(tài)表被動(dòng)意義。, This kind of shirt sells well.,2. look,sound,taste,smell等系動(dòng)詞用主動(dòng)表被動(dòng)意義。 例： It smells wonderful. Mooncakes taste delicious.,3. 在be worth doing中，doing表被動(dòng)意義。 例：This book is worth reading.,4. want/need/require+doing =want/need/require+to be done 例：My bike needs repairing. =My bike needs to be

6、repaired. 我的自行車需要修理。,課堂練習(xí) （一）改寫句子 1. We plant trees in spring every year. _ by us in spring every year. 2. She posted the letter yesterday. _ by her yesterday. 3. Mr Turner gave me a birthday present. _a birthday present by Mr. Turner. 5. You may hand in your homework tomorrow. _ by you tomorrow. 6.

7、 She is going to write a letter. _ by her.,Trees are planted,The letter was posted,I was given,Your homework may be handed in,A letter is going to be written,1. If city noises _ from increasing, people _ shout to be heard even at dinner. A are not kept; will have toB are not kept; have C do not keep

8、; will have to D do not keep; have to 2. The fifth generation computers, _and perfected now.A. developed B. have developed C. are being developed D. will have been developed3. - _ the sports meet might be put off. - Yes, it all depends on the weather. A Ive been told B Ive told C Im told D I told,A,

9、C,A,4. I need one more stamp before my collection _. A. has completed B. completes C. has been completed D. is completed 5. Rainforests _ and burned at such a speed that they will disappear from the earth in the near future. A. cut B. are cut C. are being cut D. had been cut 6. The new bridge _ by the end of last month. A. has been designed B. had been designed C. was designed D. would