M2U1 grammar(教师版) 2.docVIP

Module 2 Unit 1 Tales of the unexplained Period 3 Grammar Present perfect tensePresent perfect continuous tense 【学习目标】 掌握现在完成时和现在完成进行时的用法。 2.区分现在完成时和一般过去时及现在完成时和现在完成进行时。 【知识线索】 现在完成时是一种既涉及过去又联系现在的时态。现在完成进行时是动作开始于过去，持续到现在，有可能还会延续下去的时态。 He has lived in Beijing for ten years. I have already seen the film. He has been learning English for 6 years. I have been looking for you everywhere. 【知识构建】 现在完成时： 1.现在完成时的构成：肯定句_________________ 否定句______________ 疑问句______________ 主语( I/We/You/They) + ______ +过去分词 主语(He/She/It) + _______ +过去分词 Keys: have/has +过去分词；have/has + not +过去分词； Have/Has +主语+过去分词......?；have; has 2.现在完成时的用法： ⑴ The boy _ _ (catch) a bird. He is very happy. has caught (2) Jack _________ (see) the concert. He doesn’t want to see it again. has seen (3) She ____ just _______ (come) back from the USA. has come (4) I _____ never ______ (visit) San Francisco in the USA. have visited 总结:现在完成时: 表示’t get off the bus until it ________ (stop). has stopped (13)I won’t believe you unless I ________ (see) it with my own eyes. have seen 总结：现在完成时在时间、条件或让步状语从句中表达将来某时已经完成的动作，即用现在完成时表将来完成时。 (14)---- Where is Li Hua ? -----He ______ to the reading room. (has been/has gone) has gone (15)----She knows about Shanghai. -----She _______ to Shanghai twice.(has been/has gone) has been 总结：表示曾经去过某地，人已回来用have/has been to; 表示已去某地，人还未回来用have/has gone to。 (16)我来这儿有20年了。 I have come here for 20 years. (False) I have been here for 20 years. (True) I came here 20 years ago. (True) 总结：瞬间动词可以用于完成时态，但不可以接表示一段时间的状语。若要接一段时间的时间状语，需要用持续性动词表示。常见的瞬间动词有：come, go, join, buy, borrow, lend, leave, arrive, die, marry, begin, start, lose, finish, receive... 现在完成进行时： 1.现在完成进行时的构成：_____________________ have/has been doing 2.现在完成进行时的用法 (17)这篇文章我已经翻译两小时了。 I___________________ the article for two hours. have been translating (18)自从1987年以来，他一直在这儿工作。 He__________________ here since 1987. has been working (19)