现在完成时用法课件2023-2024学年人教版八年级英语下册

现在完成时 The Present Perfect Tense (1) 1 现在完成时: 1. 用法: 1. 表示过去发生或已经完成的某一动作对现在造成的影响或结果。常与already, so far, never, just, before, recently等时间状语连用。 I finished my homework yesterday , that’s to say, I have finished my homework。 I have lived here for five years. 2. 结构: 肯:主+have/has +过去分词+其它 否:主+have/has+not+过去分词+其它 疑:Have /Has +主语+过去分词+其它 回答:Yes,主语+ have/ has No, 主语+ have/ has + not. He has finished the work. He has not finished the work. Has he finished the work? 1 、规则变化: ①一般动词,在词尾直接加“ ed ”。 work-worked-worked, visit-visited-visited ②以“ e ”结尾的动词,只在词尾加“ d ”. live-lived-lived, ③以“辅音字母 + y ”结尾的动词,将 "y" 变为 "i" ,再加“ ed ”。 study-studied-studied, cry-cried-cried ④重读闭音节结尾,末尾只有一个辅音字母,先双写该辅音字母,再加“ ed ”。 stop-stopped-stopped, drop-dropped—dropped 不规则变化详见课本后 动词的过去式和过去分词的规则变化和不规则变化: “直、去、双、变” 3. 标志词 ①already 已经 肯定句中或句尾 I have already read this book. = I have read this book already. ②yet已经 否定句和疑问句句尾 I have not read this book yet. Have you read this book yet? ③ever曾经 句中 Have you ever read this book? ④never从不 句中 I have never read this book. ⑤just刚刚 句中 I have just read this book. ⑥before以前 句尾 I have never read this book before. ⑦so far到目前为止 So far he has learnt 200 words. just, already, yet, before, ever, never eg.Have you _been to Japan? I have _ finished my homework. I have finished my homework _. I haven’t finished my homework _. ever just already yet 用适当的词填空 4. have been to 和 have gone to 的区别: have<has>gone to 去了某地 have<has>been to 去过某地 E.g. He has gone to Beijing (去了北京) He has been to Beijing. (去过北京) 1. John _ England since two years ago. 2. Would you like to _ the zoo with me? -Yes, but I _ there before. 用go, have been to, have gone to 的正确形式填空 不规则变化的巧记规律: AAA: cost-cost-cost read-read-read let-let-let put-put-put cut-cut-cut 特殊:动词read的过去式和过去分词虽然词形与原形一致,read-read-read,但发音分别是[ri:d]-[red]-[red]. ABA: run-ran-run come-came-come become-became-become ABB: have (has)-had-had leave-left-left make-made-made feel-felt-felt sit-sat-sat win-won-won find-found-found hear-heard-heard 大家一起来找茬 ABC: t