Unit1 When was it invented SectionA課件1.ppt

1、Unit 1 When was it invented?,Can you read them ?,0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1840 1635 1729 1632 1989 1923 1998 2008 2013 2014 1600 1800 2000,Can you tell me ?,When were you born ? When was your mother born ? When was your best friend born ?,What are the Four Great Invention

2、s in ancient China?,Do you know?,paper-making 造紙術(shù),compass 指南針,printing 印刷術(shù),gunpowder 火 藥,造紙術(shù),印刷術(shù),Look at the things. In what order do you think they were invented?,1a,A: I think the calculator was invented before the computer. B: well, I think the calculator was invented after the computer.,Talk abo

3、ut with your parterner.,Listen and match the inventions with the dates.,1b,_ 1876 _ 1885 _ 1927 _ 1971 _ 1976,d,a,e,c,b,Who invented the car?,_ invented the car.,Karl Benz,Karl Benz,The car_ _ by_.,was invented him,1885,When was it invented ?,It was invented in 1885.,1876,Bell,Who invented the telep

4、hone ?,Bell invented the telephone。,The telephone was invented by Bell.,It was invented in 1876.,Sample dialogues: A: When was the telephone invented? B: I think it was invented in 1876. A: When was the car invented? B: I think it was invented in 1885. I think it was invented after the telephone.,Pa

5、irwork,1c,.主動語態(tài)與被動語態(tài)： 英語動詞有兩種語態(tài),即主動語態(tài)(The Active Voice)與被動語態(tài)（The Passive Voice)。 主動語態(tài)表示主語是動作的執(zhí)行者; 被動語態(tài)表示主語是動作的承受者。,主動語態(tài),被動語態(tài),主動語態(tài),被動語態(tài),e.g Many people speak English.,主動語態(tài)變被動語態(tài)的步驟： 1、主動語態(tài)的賓語變?yōu)楸粍诱Z態(tài)的主語； 2、主動句的謂語動詞變?yōu)楸粍咏Y(jié)構(gòu)； 3、主動句的主語變?yōu)楸粍泳涞馁e語，由by 引出，當(dāng)不強調(diào)動作的執(zhí)行者時，常省略。 4.其它成分不變。,變被動語態(tài)時需要注意的事項,一變 二套 三注意,賓變主，主變賓

6、，賓語前面by跟，謂語動詞變過分，不忘前面be動詞跟,套時態(tài)，主被動時態(tài)一致,注意因人稱的變化而引起的主謂一致問題。,各種時態(tài)的被動語態(tài)的構(gòu)成：,1.一般現(xiàn)在時態(tài) am, is, are +過去分詞 2.一般過去時態(tài) was, were +過去分詞 3.一般將來時態(tài) will/am.is.are going to + be +過去分詞 4.過去將來時態(tài) would/was.were going to + be + 過去分詞 5.現(xiàn)在完成時態(tài) have, has + been +過去分詞 6.過去完成時態(tài) had + been +過去分詞 7.現(xiàn)在進行時態(tài) am, is, are + being

7、 +過去分詞 8.過去進行時態(tài) was, were + being +過去分詞 9.含情態(tài)動詞的 情態(tài)動詞 + be +過去分詞,所有時態(tài)的被動語態(tài)否定就是在 最前面的助動詞后加 not 疑問就是把最前面的助動詞提前。,Many trees are not being planted now,Are many trees being planted now?,把下列的句子變?yōu)楸粍诱Z態(tài)的句子： 1、They speak English in Canada . 2、People used wood for making tables. 3、They are making computers in

8、the USA.,English is spoken in Canada(by them).,Wood was used for making tables.,Computers are being made in the USA.,把被動句變否定,Computers arent being made in the USA.,4、They have grown rice in South China. 5. We must plant more trees next year. 6.I am going to clean our classroom tomorrow.,More trees m

9、ust be planted next year.,Our classroom is going to be cleaned tomorrow.,Rice has been grown in South China.,把被動句變疑問.,Has rice been grown in South China？,把下列句子改為被動語態(tài)。 1. They made these computers in Shenzhen. These computers _ _ in Shenzhen. 2. She bought a new bike yesterday. A new bike _ _ by her yesterday.,were made,was bought,3. The students clean the room every day. The room _ _ by the students every day. 4. He will sing a new song at the party. A new song _ _ _ by him at the part