课件12张PPT。Unit 4 An Exciting TripAn exciting trip I’ve just received a letter from my brother Tim. He is in Australia. He’s been there for six moths. Tim is an engineer. He is working for a big firm and he’s already visited a great number of different places in Australia. An exciting trip He’s just bought 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. An exciting tripGuided ConversationFrom my brother. In Australia. For six months. He’s an engineer. A big firm. Yes, he has. An Australian car. To Alice Spring. Darwin. To Perth. No, he won’t.Pattern PracticeHave/has done 现在完成时表示发生在过去的某个时间（具体时间不清楚）并一直持续到现在的动作。注意yet只能用在疑问句和否定句中。 句型1 Have you received Tim’s letter yet? 句型2 - Why don’t you read that book? - Because I’ve already read it. 句型3 He’s gone to Australia. 句型4 - Has the train arrived? - No, it hasn’t arrived yet. Key Structuresa.现在完成时表示 i. 动作发生在过去的某个时间（确切的时间并不重要，也不会给出），但影响十分明显，例如 I have read the letter, but I don’t understand it. ii. 动作开始于过去，现在仍在继续或刚刚结束。这时经常与for+一段时间或since+时间点一起使用 He has been there for six months. He has never been abroad before. iii. 动作刚备完成，例如I have just received a letter from my brother. Key Structuresb. already 用在肯定句中，yet用在否定和疑问句中。 He has (already) visited a great many of places (already). The train hasn’t arrived yet. Key Structuresc.注意have gone 和have been 区别 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. 表示他曾经去过那里，但他现在已不再那里。 Key StructuresFinish the exercises.Readingsix… disappointed… today… birthday cards cards… presents… postman… delivered… mother… What has happened to the post? strike… deliver your cards find… some… collect them on their way… post office happy… after all
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