Unit 8 现在完成时态 课件 2022-2023学年人教版英语八年级下册

Present Perfect Tense-By Simba —have/has（助动词） + done（过去分词） 1 Teaching Goals： Knowledge：学生掌握现在完成时态的定义、结构、时间标志词及与一般过去时态的区别. Skill: 学生能够运用现在完成时态表达已经发生的事情. Teaching key/difficult points： 重点掌握现在完成时态的时间标志词already/yet; ever/never; “since+一般过去时”和“for+段时间” Have been to/ have gone to / have been in的区别 延续性动词和非延续性动词的用法辨析 Type of lesson：New class About the Class I haven’t seen Bob these days. (这几天我一直没见到Bob。)  I’ve known Bob for 20 years. (我已经认识海绵宝宝2o年了。)  I’ve been at this store for over 10 years. (我已经在这家店干了10多年了。)  I have lived here since 1999. (自从1999年来我就住在这儿了。)  4 现在完成时态用法1： 某些动词的现在完成时可表示过去某一时间开始并一直持续到现在（包括现在在内）的动作或状态。可以和表示延续的时间状语连用。表示持续动作或状态的动词多是延续性动词。如此处的seen; known; been at; lived…… I haven’t seen her these days. I’ve known Bob for 20 years.  I’ve been at this store for over 10 years. I have lived here since 1999.  — Have you had your lunch yet? (你已经吃过午饭了吗？)  — Yes, I have. I’ve just had it. (是的，我已经吃过了。我刚吃了) — Have you read Little Women yet? (你看过Little Women 这本书吗？)  — No，I haven’t. (不，我没看过。) 6 现在完成时态用法2： 表示过去发生或已经完成的动作对现在造成的影响和结果 I haven’t read the book Little Women yet.  I have just had lunch. 过去的动作：had lunch 对现在造成的影响：现在我不饿了 过去的动作：read the book 对现在造成的影响：我对该书并不了解 No, I haven't. I have never seen UFO. (不，我从没见过UFO。)→回忆过去经历  Have you ever seen UFO? (你见过UFO吗。) →回忆过去经历 8 现在完成时态用法3： 表示动作已经发生，现在回忆过去经历。 I have ever seen ET. 过去的动作：seen 现在回忆是否有看见过：没见过/看见过 Summary1: 用法小结 1-某些动词的现在完成时可表示过去某一时间开始并一直持续到现在（包括现在在内）的动作或状态。可以和表示延续的时间状语连用。表示持续动作或状态的动词多是延续性动词。如此处的seen; known; been at; lived…… 2-表示过去发生或已经完成的动作对现在造成的影响和结果 3-表示动作已经发生，现在回忆过去经历。 I have already taught him some dance. Bob has not opened the gift box yet. 现在完成时态时间标志词: ①对现在的影响：already/yet/just already: 已经; 可用于肯定句句中、句尾。 Have you had your lunch yet? yet: 常用于否定句句末——表示“还”、疑问句句末——“已经”。 Mom has just cleaned the house. yet: 常用于肯定句句中——表示“刚才” I’ve known Bob for 20 years.  I have lived here since 1999.  现在完成时态时间标志词： ②过去持续到现在：for/since E.G: I have taught you English since 3 months ago.  Since+时间点 “自从...”； Since+时间段+ago “自从...以前”；