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课件网) Module 4 Unit 3 Language in use I haven’t done much exercise since I got my computer last year. I have had him for three months now. Since then, it has become part of my life. 现在完成时 （三） 现在完成时表示在以前某个时间已经发生的行为或曾经做过的事情对目前有某种影响或结果(这种影响或结果现在还存在)。 We have seen the film two weeks before. I have told him the bad news. 过去看了电影，并且了解电影内容 过去告诉他坏消息，并且他已经知道了消息内容 现在完成时可以用来表示发生在过去某一时刻的,持续到现在的动作(用行为动词表示)或状态(be动词表示)。 My uncle has worked in the factory for three years. He has been ill for about three days! 用 法 三年前到现在一直在这个工厂 三天前到现在一直在生病 1. 这类句子通常包含由for或since引导的时间状语（从句），for后接段时间，since后接时间点。 I have lived in Beijing for 10 years. I have been in this school since 2000. Since then, We have become friends. 注意事项 2. 用how long对现在完成时的时间状语提问。 I have lived in Beijing for 10 years. How long have you lived in Beijing I have been in this school since 2000. How long have you been in this school 注意事项 3. 在现在完成时的句子中,终止性动词一般不能与表示延续的时间状语连用。 汤姆已经来了两小时了。 ( )Tom has come for two hours. ( )Tom has been here for two hours. ╳ √ 注意事项 拓 展 终止性动词与延续性动词如何转换 (1) 转化为“be+形容词/副词等”。 die → be dead leave → be away (from) open/close → be open/closed stop → be over arrive in (at)/reach/get to → be in/at join → be a member of/ be in start/begin → be on They have left for two years. They have been away for two years. I have arrived at this town for a long time. I have been at this town for a long time. My brother has joined the army since last year. My brother has been in the army since last year. 拓 展 终止性动词与延续性动词如何转换 (2) 转化为意思相同的延续性动词。 borrow → keep buy → have/ own become/ come → be get to know → know put on → wear/ be on I have bought the new bike for a month. I have had the new bike for a month. He has borrowed this book since last week. He has kept this book since last week. The girl has come to the city for three years. The girl has been in the city for three years. 1. Her parents came to China five years ago. Her parents _____ _____ _____ China since five years ago. 2. Susan bought this coat two days ago. Susan _____ _____ the coat _____ two days ago. 3. He joined the army in 2009. He _____ _____ a soldier _____ three years. 4. I began to play the piano ten years ago. I _____ _____ the piano _____ ten years. 同义句转换 have been in since for has had for has been have played 课堂小结 现在完成时 基本用法：表示在以前某个时间已经发生的行为或曾经做过的事情对目前有某种影响或结果(这种影响或结果现在还存在) ；表示发生在过去某一时刻的，持续到现在的动作。 注意事项：1. 这类句子通常包含由for或since引导的时间状语（从句），for后接段时间，since后接时间点。 2. 用how long对现在完成时的时间状语提问。 3. 在现在完成时的句 ... ...
