2014年春八年级英语下册现在完成时.ppt

Present Perfect Tense; 1.过去发生的动作对现在造成的影响或结果。; 现在完成时动词构成 have /has+v 过去分词(及物动词) ;;注意：never, ever一般置于助动词have/has之后，过去分词之前。; already 已经，常用于肯定句中。一般置于助动词have/has之后，过去分词之前，但也可以放在句末。 我已经看过这部电影了。 I have already seen the film. 我已经解决了这个问题。 I have already solved this problem. 我已经做完家庭作业了。 I have finished my homework already.;yet，在现在完成时句型中常置于句末。 1) 已经，常用在疑问句中。 琳达已看过这本书了吗? Has Linda read the book yet? 你完成家庭作业了吗？ Have you finished your homework yet? 2) 还，仍然，常用于否定句和疑问句。 他还未开始工作。 He has not begun to work yet. ;just 刚刚，常用于肯定句中。一般置于助动词have/has之后，过去分词之前。 我刚吃过午饭。 I have just finished lunch. 我们刚刚听说她的婚讯。 We have just heard of her marriage. ;特征词: already(肯定句) yet(否定句和疑问句) never，ever(疑问句) just (谓语动词之前) before(句末）so far, these days, for+ 时间段 , since+时间点， since+句子（过去时）;1.Have you ________(曾经) been to Beijing? No, _____(从来没有). 2.I have ______(刚刚) finished my work. 3.I have finished my work_______(已经). 4.Have you finished your work______(已经)? 5.She has taught English _____ 10 years. 6.He has worked in the factory ______(自从) one year ago. 7.I have heard of the story _______(以前).;Excuse me. Have you _____ (see) my dictionary? Have you _____ (find) your wallet yet? I ____ already _______ (finish) my homework. Let’s go out. _____ you _____ (read) today’s newspaper yet?;按要求进行句型转换;have/has gone tohave/has been to have/has been in;Exercises ;1.where is Jim? He Wuhan. 2. My parents the Great Wall twice. They like there very much. you ever to the place? How long Peter the West Hill farm? My sister the shop. She will be back in two hours. She Shanghai. She isn’t here. She Shanghai. She is here. She Shanghai for two years;虽然这两个时态都和过去发生的事情有关，但是现在完成时强调这一动作与现在的关系，如对现在产生的结果、影响等，而一般过去时只表示过去的事实，不表示和现在的关系。如：;现在完成时与瞬间动词;1.直接转化成延续性动词 buy