现在完成时与现在完成进行时课件.ppt

1、l,Learning goal: the difference between the past tense and the present perfect tense.,Present perfect tense and Past tense,现在完成时与一般过去时的用法比较 现在完成时不能和 yesterday, last night, two weeks ago等具体的过去时间状语连用。 The plane has arrived . （说明现在的情况：飞机在这儿） The plane arrived a quarter ago. （动作发生在过去与现在无关） I have taught

2、 here for fifteen years. （表示十五年前的动作一直延续到现在，还可能会继续。） I taught here for a year. （曾在这儿教过，但现在不在这儿任教了）,Comparasion,1.自从2001年以来, 中国人的饮食已经发生了很大的变化.,Great changes have taken place in Chinese diet since 2001,2.汤姆已经结婚10年了. Tom has been married for ten years,3. 学生把所有的零花钱都捐给灾区了（disaster area） The students have

3、donated all their pocket money to the disaster area,translation:,不累啊？你已跳了三个小时啦！,Arent you tired？ You have been jumping for three hours.,她肯定累了，因为她一天一直在跳舞,She must be tired, for she has been dancing all day.,The Present Perfect Continuous Tense,Part B:,Form:,have/has + been + doing,I_ (sleep) since sv

4、eral days ago,havent been sleeping,Connection with the past: Connection with the present:,I couldnt sleep several days ago.,I am not sleeping well now.,Analysis(分析),意义：过去某时开始一直延续至今的动作，可能还要继续进行表示动作从过去某一时刻开始，一直延续到现在，现在这个动作可能刚刚终止，也可能仍然在进行着。,Now that she is out of a job, Lucy _going back to school, but she hasnt decided yet. A. had considered B. has been considering C. considered D. is going to consider,Review,链接高考,1. Where have you been? We _ for you everywhere . A. look B. were looking C. have been looking D. had been looked 2. I wonder why Jenny _ us recently. We should have heard fro