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课件网) Module 4 Unit 3 Language in use Grammer Review 现在完成时的结构、用法及句型？ 1.结 构 2.用 法 3.句 型 1.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 2.表示到目前为止已经完成的事情 have/has + 动词过去分词 Have/Has+主语+动词的过去分词(V-ed)+宾语 肯定回答: Yes, 主语+ have/has. 否定回答: No, 主语+ haven't/hasn't. 主语+have/has+动词的过去分词(V-ed). 主语+have/has + not +动词的过去分词(V-ed). What else 1 2 能掌握 for 和 since 在现在完成时中的应用。 能熟练运用现在完成时谈论有关看病的经历。 目标一:掌握 for 和 since 在现在完成时中的应用 Activity 1 Read the following sentences first and put them into Chinese, then talk about them in groups. 1. I haven’t done much exercise since I got my computer last year. 2. I have had him for three months now. 3. Since then, it has become part of my life. Group Discussion 小组合作观察每个句子，讨论、总结并分组展示。 Task 1: 思考现在完成时还可以表达什么含义； Task 2: 探究总结现在完成时与for, since连用时有什么联系 与区别, 并思考如何进行转换； Task 3: 查阅相关资料总结现在完成时的常用句型、如何 对现在完成时的时间状语从句提问。 1. I haven’t done much exercise since I got my computer last year. 2. I have had him for three months now. 3. Since then, it has become part of my life. Activity 2 每个小组派代表总结发言。 1 组 2 组 3 组 4 组 Activity 3 Summary for 和 since 在现在完成时中的应用 1.含 义 1.当表示动作已经完成并对现在有一定影响时，我们一般用现在完成时。同时，可分别用just, already或yet加以强调或说明。 2.还可以表示某一行为或某一状态从过去某一时间一直持续到现在，我们也可借助现在完成时。 通常要与表示一段时间的时间状语连用，这类 状语通常由for,since引导。 2.for与 since与现在完成时连用时的联系、区别与转换 与延续性动词连用,也可以与非延续性动词的否定式连用。 e.g. I have bought this computer since four years ago. (×) I have had this computer since four years ago. (√) I haven't heard from him for 3 weeks. (√) 联 系 【拓展】非延续性动词和延续性动词的转换 leave — be away borrow — keep buy — have begin/start — be on die — be dead finish — be over open sth—keep sth open fall ill — be ill get up—be up come here — be here go there — be there become — be come back—be back fall asleep — be asleep leave — be away from get to know — know go (get) out —tie out put on—wear catch a cold —have a cold get married—be married等 ① since后须接“时间点”, for后须接“时间段”; e.g. He has studied English since 1999. He has studied English for five years. ② since能引导时间状语从句(主句用现在完成时， 从句用一般过去时)，而for则不能。 e.g. He has taught here since he came to China. We have been friends since we met in school. 区 别 转 换 for + 一段时间 = since + 一段时间 + ago He has been here for five weeks. = He has been here since five weeks ago. 2.for与 since与现在完成时连用时的联系、区别与转换 3. 现在完成时常用句型 ② This is the first (second…) time that + 从句 句型中的that从句通常使用现在完成时 e.g. This is the first time that Jenny and Dan ... ...
