Unit 5 What are the sUnit 5 What are the shirts made of--被動語態(tài).hirts made of--被動語態(tài).ppt

1、被動語態(tài),被動語態(tài)的基本構成： be+動詞的過去分詞 （be+done),1.一般現(xiàn)在時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was/were+done,He made the kite. The kite was made by him.,3.一般將來時 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has /have +been done,Jim has finished the work. The work has been finished by Jim.,5.含有情態(tài)動詞的被動語態(tài),can/may/must/should +be done,I can find

3、 him. He can be found by me.,被動語態(tài)的用法,1. 不知道動作的執(zhí)行者是誰。,這塊手表是中國制造的。 This watch is made in China.,2. 沒有必要指出動作的執(zhí)行者,每年都應該種更多的樹。 Many trees should be planted every year.,3. 需要強調(diào)或突出動作的承受者。,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.,主動語態(tài)變被動語態(tài)的方法,（主語） （賓語） 主動語態(tài)：動作的執(zhí)行者+謂語動詞的主動形式+動作的承受者 被動語態(tài)：動作的承受者+謂語動詞的被動形式+動作的執(zhí)行者 （主語） （賓語）,說明： （1）要將主動句里的賓語變?yōu)楸粍泳渲械闹髡Z，若主動句中的賓語為人稱代詞，要將賓格變成主格。 （2）把主動句中的主語變?yōu)楸粍泳渲械馁e語，主格變賓格，并由by引導。 （3)謂語動詞變成相應的被動形式。,補充部分,1. 主動結構表被動意義,open，lock，write，read，sell，wash， cut，burn，drive等詞作不及物動詞時，它們的主語為物，可以用

5、主動語態(tài)表被動意義。, This kind of shirt sells well.,2. look,sound,taste,smell等系動詞用主動表被動意義。 例： It smells wonderful. Mooncakes taste delicious.,3. 在be worth doing中，doing表被動意義。 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 （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