Unit5Grammar课件2023-2024学年沪教牛津版英语八年级上册

Watch a video 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