Unit 8 Have you read Treasure Island yet Period3 Grammar Focus 课件2022-2023学年人教版八年级英语下册

Unit8 Have you read Treasure Island yet? Period3 GF I ____ ____ the highest mountains, I_____ _____ through the fields. Only to be with you. Only to be with you. I have run. I _____ crawled（爬行）.I ____ scaled（测量） these city walls. These city walls. Only to be with you. But I still ______ found what I'm looking for. Let’s fill in the blanks! have Present perfect tense 现在完成时 haven’t have have have climbed run dirty, in a mess the past now clean and tidy Guess: What have we done? Usage (用法) 1) 现在完成时态表示 __________ 发生的动作对 ________造成的 __________或 _________. e.g. We have cleaned the classroom already. (Our classroom is clean now.) 过去 现在 影响 结果 e.g. I am very hungry now. I______ breakfast yet.  A . didn't eat B. ate C. haven't eaten D. have eaten 现在完成时的意义 We have studied in Donghua for 2 years. = We came to Donghua two years ago. ＋ Maybe we will continue to study in Donghua. 意义2：表示在________的发生的动作或存在的状态， 持续到了_________, 还有可能持续到___________. ＋ We still study in Donghua now. 过去 现在 将来 Group work 1.I have already finished my homework. 2.He has just spent all his money. 1.I haven't met him yet. 2.She hasn't brought her money. 1.Have you read Little Women yet? 2.Has she read Treasure Island yet? Groupwork： 1.现在完成时的构成（肯定句、否定句、一般疑问句及回答) 2.already&yet的区别 3.现在完成时的标志词。 Sb+have/has+done Sb+have/has+not+done have/has+sb+done 一般疑问 句及回答 Yes, I have. No, I haven't. Yes, she has. No, she hasn't. Yes，sb +have/has No, sb+ have/has+not 肯 否 肯定句 否定句 助动词，无意义 助动词后面加not 动词的过去式和过去分词的规则变化 规则变化（找规律）： (1)一般动词，在词尾直接加“ ” finish---finished---finished (2)以“ ”结尾的动词，只在词尾加“ ” 　 decide---decided---decided (3)以“ ”结尾的动词，将“ ” 变 为 “ ”，再加“ ” study---studied---studied (4)重读闭音节结尾，末尾只有一个辅音字母，