Unit 9 Section A（Grammar Focus-4c）课件2022-2023学年人教版八年级英语下册

Section A Grammar focus-4c Unit 9 Have you ever been to a museum? Objectives 学习目标： 1.Have been to 和have gone to 的用法及区别 2.学习现在完成时的构成及用法。 3.现在完成时和一般过去时的区别。 4.动词的变化分类。 ---We are late for the movie. ---Wow. The movie has begun. ---He is a famous person, Yuan Longping. ---What a pity. He has died. Grammar Focus Have you ever been to a science museum? Yes, I’ve been to a science museum./ No, I’ve never been to a science museum. Have you ever visited the space museum? Yes, I have. I went there last year./ No, I haven’t. I’ve been to the art museum many times. Me, too. And I’ve also visited the nature museum. I’ve never been to a water park. Me neither. have/has been to 曾经去过某地 Have you ever been to a science museum? Yes, I've been to a science museum. /No, I've never been to a science museum. Have you ever visited the space museum? Yes, I have. I went there last year. / No, I haven't. I've been to the art museum many times. Me, too. And I've also visited the nature museum. I've never been to a water park. Me neither. Grammar Focus 主语+have/has +过去分词done 主语+have/has +been to+地方 So have I. Neither have I. 现在完成时 一、现在完成时的用法 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。 常和副词already(已经)，yet(还，已经)，never(从不)， ever(曾经)，before(以前)，just(刚刚，仅仅)等连用。 e.g. –Have you had your lunch yet? –Yes, I have. I’ve just had it. (现在我不饿了) 2．表示过去开始,持续到现在,将来还可能持续下去的动作或状态。 常与“since＋过去的时间点/一般过去时从句/时间段+ago”， “for＋一段时间”与so far（到目前为止）等时间状语连用。 I have learnt English for eight years.(从10年前开始，持续到现在还在学。) 在第2种用法中，肯定句和疑问句中的谓语动词必须是延续性动词。 注意：never, ever一般置于助动词have/has之后，过去分词之前。 1. never 从来没有，从不，表示否定 He has never seen such a tall building. 他从未见过这么高的楼。 2. ever 曾经，主要用于疑问句 Have you ever wanted to travel around the world? 你曾经想要周游世界吗？ 现在完成时--与 ever, never 连用现在完成时--与 ever, never 连用 肯定句： 否定句： 一般疑问句： 二、现在完成时的句式结构 主语+have/has +过去分词 主语+have/has +not ever+过去分词 Have/Has+主语+过去分词 肯定回答： 否定回答： Yes, 主语+have/has . No, 主语+have/has + not. 现在完成时 助动词 have (has）+ 过去分词do