新概念英語青少版4A Unit 4

1、Unit 4 An Exciting TripAn exciting tripIve just received a letter from my brother Tim. He is in Australia. Hes been there for six moths.An exciting tripTim is an engineer. He is working for a big firm and hes already visited a great number of different places in Australia. An exciting tripHes just b

2、ought an Australian car and he is going to Alice Spring. A small town in the center of Australia. He will soon visit Darwin. From there he will fly to Perth. My brother has never been abroad before. So he finds this trip very exciting. Guided Conversation1.From my brother.2.In Australia.3.For six mo

3、nths.4.Hes an engineer.5.A big firm.6.Yes, he has.7.An Australian car.8.To Alice Spring.9.Darwin.10. To Perth.11. No, he wont.Pattern PracticeHave/has done 現在完成時表示發(fā)生在過去的某個時間（具體時間不清楚）并一直持續(xù)到現在的動作。注意yet只能用在疑問句和否定句中。句型1 Have you received Tims letter yet?句型2 - Why dont you read that book? - Because Ive a

4、lready read it.句型3 Hes gone to Australia.句型4 - Has the train arrived? - No, it hasnt arrived yet. Key Structuresa.現在完成時表示i. 動作發(fā)生在過去的某個時間（確切的時間并不重要，也不會給出），但影響十分明顯，例如 I have read the letter, but I dont understand it.ii. 動作開始于過去，現在仍在繼續(xù)或剛剛結束。這時經常與for+一段時間或since+時間點一起使用He has been there for six months.He

5、 has never been abroad before.iii. 動作剛備完成，例如I have just received a letter from my brother.Key Structuresb. already 用在肯定句中，yet用在否定和疑問句中。He has (already) visited a great many of places (already).The train hasnt arrived yet.Key Structuresc.注意have gone 和have been 區(qū)別He has gone to Alice Springs. 表示他在那里或正在去那里的路上。He has been to Alice Springs. 表示他曾經去過那里，但他現在已不再那里。Key Structures Finish the exercises.Readingsix disappointedtoday birthday cardscards presents postman deliveredmother What has happened to the pos