现在完成时重点讲解 .pptx

学习目标Course Objectives2掌握现在完成时的用法及相关时间状语1. 掌握现在完成时的含义及结构3. 短暂性动词与时间段的关系 4.have been 与have gone 比较 5.与一般过去时的用法比较 PART 01现在完成时的含义及结构现在完成时重点讲解 PPT.The concert has finished for half an hour. been over The concert has finished for half an hour. been over Some verbs cant often be used with for or since be in be a …member be away keep be on He has bought the book. He has bought the book for a week. He has had the book for a week We ____________ each other since childhood . We ____________ each other when we were young . know have known knew [结构辨析] have/has been to+地点 “去过，已回” have/has gone to+地点 “去了，未回” They have been to Beijing. They have gone to Beijing. 1. —May I speak to Mr. Smith? — Sorry, he isn’t here. He______ Changsha. A. has been to B. has gone to C. went to 2. — Where is your brother? — He ____________ the shop. He’ll be back soon.3. — ______ you ever _________ to America? — Yes, I ___________ New York twice.[练习] 2.动作从过去一直持续到现在并且可能继续延续下去通常和for或since引导的时间状语连用. [时间状语] 句子 We haven’t used our car for a long time.He has lived in Beijing since he was a little boy.He has lived in Beijing since 1986. 夏天还会远吗 ?will it still be far in summer?春天已经来了,Spring has already come, 现在完成时态Springhas already come. 现在完成时的定义表示过去某一时间发生的动作或存在的状态对现在造成的结果和影响，或从过去某一时间开始一直持续到现在并有可能还会持续下去的动作或状态。 现在完成时的结构主语+ have/has + done+其他. (肯定句)主语 + have/has + not + done +其他. (否定句)Have/has + 主语 + done +其他? (一般疑问句)I have finished my homework. PART 02现在完成时的用法 现在完成时的用法[Think]目前我们学过哪些时态？nowfuturepast 现在完成时的用法[现在完成时的两个用法]强调过去发生的动作或状态对现在造成的影响或结果。动作从过去一直持续到现在并且可能继续延续下去。nowfuturepast 现在完成时的时间状语1.强调过去发生的动作或状态对现在造成的影响或结果。[常与 already, just, yet, ever, never和before等标志词连用] I have already lost the key. (我现在没有钥匙) I have just cleaned my hands. (手是干净的) He hasnt come back yet. (还没回来)already: 常用于肯定句中just:常用于肯定句中yet: 常用于否定句、疑问句尾 ever 曾经 用于疑问句中 never 从不 带有否定意义A: __Have_ you