(
课件网) Unit 5 Educational exchanges The present perfect tense (一) Period 1 On Mother’s Day , what has Tom done for his mother Tom & Mom Tom said I have finished_____ . I have cleaned_____ . I have made _____. all my homework all the rooms some delicious food Present Perfect Tense ( 现在完成时 ) 探究一 现在完成时态用法（1） When should we use the present perfect tense I have finished all my homework. I finished myhomework. The thing is over. So I can relax now. What does he mean I have cleaned all the rooms. I cleaned the rooms. The thing is over. Now, the rooms are clean. I have made some delicious food. I cooked the food. The thing is over. So mom can enjoy the food now. I have made some delicious food for mom. past now I made some food. Mom can enjoy it now . 现在完成时表示 _____ 发生的事情对 _____ 造成的影响或结果，表示已经做了某事。 。 过去 现在 探索二：现在完成时的基本结构 I have finished all my homework. I have cleaned all the rooms. I have made some delicious food. 基本结构： 主语 + have+ 过去分词 + 其它 Tom _____(have/has) finished all his homework. He _____cleaned all the rooms. He _____made some delicious food. 现在完成时：主语 + have /has + 过去分词 + 其它 has has has 已经做了某事 Try to find the rules. 动词原形 过去式 过去分词 play played played live lived lived stop stopped stopped study studied studied meet met met see saw seen do did done 变化规则 直 去 双 改 不规则变化 Let 's read read – read – read find – found - found hear – heard – heard leave – left – left tell – told – told buy – bought – bought see – saw - seen make –made-made do – did—done Practice I like the book very much. I know the story in it, because I_____. have read the book read I have = I’ve Jim is very happy ,because he_____. He has=he’s has found his keys find I can’t see Lucy today, because Lucy_____. has left Beijing leave Beijing Eric isn’t lonely ,because he_____. has made a lot of Chinese friends make not not 探索三：现在完成时的否定句 They have made a lot of new friends. He has made a lot of new friends. 否定句在 _____ 后面加 not， 表示还没有做某事 。 have not = haven’t has not = hasn’t have 或 has 思考 探索四：现在完成时的一般疑问句 Have you made a lot of new friends Yes, I have. / No, I haven’t. Has she made a lot of new friends Yes, she has. / No. she hasn’t. 现在完成时态的一般疑问句应把_____ 提前 放在句首，在询问：某人做过某事吗？肯否定回答用_____完成. have 或 has have /has A: Have you read the book B: Yes , I have. I have read the book. It’s very interesting . Pair work read the book interesting A: Have you found your English book B: Yes , I have . I have found my English book . I am very happy. find your English book happy A: Has Eric visited the Great Wall B: No, he hasn’t. He hasn’t visited the Great Wall . He’ll visit it next month . Eric visit the Great Wall visit it next month A: Has Jim done the homework B:No, he hasn’t . He hasn’t done the homework .His te ... ...
