Unit 1 This is me 语法课：现在完成时课件 2025-2026学年外研版（2024）八年级英语上册

Understanding ideas (语法) Unit 1 This is me 现在完成时 1 Read and review How many tenses can you find? time now past future 一般现在时 一般过去时 一般将来时 was, were / Ved will + V原，be going to + V原 am,is,are/ V原，V三单 Review Why is the cup empty? He has drunk the water 结果：He isn’t thirsty now. What can students do now? I have corrected your homework. 结果：You can see your mistakes. 现在完成时的核心——“过去→现在”的影响  核心定义：表示过去发生的行为，对现在有影响或留下结果，不关注“过去具体时间”。 过去做的事→ 现在的影响 eg：She has finished her homework. → 结果：She can play. (1) I have seen the film. I do not want to see it again. 这部电影我已经看过了，不想再看了。 - (2) I have entered lots of competitions. 我参加过很多比赛。 - (3) Have you ever won any prizes before? 你以前得过奖吗？ - (4) My aunt has travelled all over the world. 我姑姑已经周游了世界。 - (5) Many people have agreed to help us. 许多人都同意帮助我们。 以上句子的谓语由“have / has + 动词的过去分词”构成，表示过去发生的行为对现在有影响，或到目前为止已完成的事情。 现在完成时的“万能公式” 结构：主语+ have/has + 过去分词（done） 主语是“he/she/it”→ 用“has” - 主语是“I/you/we/they”→ 用“have” 例如： 1. He ______ (finish) his homework already. 2. We ______ ( see) each other for a long time. 3. She ______ (visit) the Great Wall before 4. My parents ______ (live) in this city since 2000. 5. The students ______ (learn) 500 English words so far.    has finished have seen has visited  have lived have learned 练习：1. 我（完成作业）→ I have finished my homework. 否定句： 疑问句： 2. 她（读这本书）→ She has read this book. 否定句： 疑问句： - 否定形式：haven’t = have not；hasn’t = has not -疑问形式：把has/have 提前 I haven’t finished my homework Have you finished my homework She hasn’t read this book. Has she read this book. 过去分词怎么变？（一）规则变化 规则：跟动词变不定式规则一样.后直接加“ed” 发音提示： 清辅音后读 /t/（例：worked /wɜːkt/） 浊辅音/元音后读 /d/（例：played /pleɪd/） 大声朗读以下单词： work → worked watch → watched hope→ hoped play → played 不规则动词（原形）过去分词需单独记忆 - 过去分词怎么变？（二）高频不规则词 常见的不规则变化 be – was / were – been do – did – done eat – ate – eaten go – went – gone see – saw – seen find – found – found have – had – had make – made – made let – let – let put – put – put cut-cut -cut write- wrote-written wear-wore-worn sit-sat-sat say-said-said learn-learnt-learnt 识别现在完成时的“信号兵”---标志词already/yet/just等 1. already（已经）： 用法：肯定句，放“have/has”后 eg：We have already arrived at school. 2. yet（已经/还）： 用法：否定句/疑问句，放句末 eg：They haven’t finished the test yet. Have you read this story yet?（疑问） 3. just（刚刚）： 用法：肯定句，放“have/has”后 eg：He has just called his friend. 小试牛刀——标志词填空 1. She ______ (already / finish) her dinner. 2. ______ you ______ (read) the book ______? 3. Tom (just / clean) his room. has already finished Have read yet has just cleaned 注意：always、never等与现在完成时连用时表示动作从过去从过去某一时刻持续到现在，属于“频度类提示词”。 eg: She has always been kind to her classmates. I have never been to beijing 时态区分（现在完成时 vs 一般过去时） 别混淆！两种时态的核心差异 对比维度 现在完成时 一般过去时 核心关注 过去行为对现在的影响 过去具体时间发生的事 时间状语 不能用（yesterday, last week） 能用（yesterday, last month） 例句+结果 I have lost my key.（现在没钥匙） I lost my key yesterday.（只说昨天丢了） 时态辨析（选择have/has done或一般过去时） 1. I ______ (meet) Tom yesterday. / I ______ (meet) Tom three times. 2. She ______ (go) to Beijing last week. / She ______ (go) to Beijing and hasn’t come back. 3. They ______ (watch) a movie an hour ago. / They ______ (watch) three movies this month. 4. He ______ (start) his new job in 2023. / He ______ (start) his new job, and he likes it now. met have met  went has gone watched have watched  started has started 一、用括号内动词填空 1.They ______ (already / eat) lunch. 2.______ she ______ (do) her homework yet? 选择正确时态 3.I ______ (see) this movie yesterday.（saw / have seen） 4.I ______ (see) this movie, so I don’t want to watch it again.（saw / have seen） have already eaten Has done saw have seen 综合练习 I’ve just cut my long hair I’ve just painted a beautiful flower on my face Chris has always worn glasses Jessica has already changed her opinion on her looks. She has never worried about her looks. have always been have always sat have always said have learnt 课堂总结 1.意义：过去的事，现在有影响 2.结构：主语 + have/has + 过去分词 3.标志词：already（肯定）、yet（否定/疑问）、just（刚刚） 4.区分：现在完成时“联现在”，一般过去时“只说过去” 课后作业 1. 写出10个不规则动词的过去分词（复习第7页） 2. 用“already、yet、just”各造1个现在完成时句子 多练多思，时态不难！ $