2023-2024学年小升初英语精美讲义+练习第18讲 现在完成时（牛津上海版试用本）

授课主题 第18讲--现在完成时 教学目标 1. 了解现在完成时的含义和结构 2. 短暂性动词与延续性动词的转变 教学重难点 since和for的使用 教学内容 知识点一：现在完成时 现在完成时定义：过去发生的动作对现在造成的影响或从过去一直持续到现在的动作。 1. 影响：We've just cleaned the classroom. 我们刚好打扫了教室。 2. 持续：They have cleaned the classroom for half an hour . 他们打扫教室已经半小时了。 1、 结构与句式 (have / has+过去分词) 肯定句：主语+ have/ has+过去分词 She has studied English. 否定句：主语+ haven’t/ hasn’t +过去分词 ___________________________ 疑问句：Have /Has +主语+过去分词 ___________________________ 肯定回答：Yes, 主语+have/ has. ___________________________ 否定回答：No, 主语+haven’t/ hasn’t. ___________________________ 二、现在完成时的用法 (1) 过去发生或完成的动作或存在的状态对现在造成的影响或结果。 He has already/just turned off the light. Have you packed yet? · 常见时间状语：already, just, yet, ever/never, before… · already/just/yet辨析 观察：I have already finished my work. I have just finished my work. I haven't finished my work yet. Have you finished your work yet? 小结：already/ just常用于________________；yet常用于________________ · Oral practice: 1. Mike has already found his watch. (改为一般疑问句) __________________________________________ 2. He has ever been to Japan. (改为否定句) __________________________________________ 3. They have already arrived in Shanghai.  (改为一般疑问句，作否定回答) __________________________________________ (2) 从过去一直持续到现在的动作或状态。 ten years 2022 2012 Mr. Smith has lived in Shanghai for ten years. =Mr. Smith has lived in Shanghai _______________________. =Mr. Smith has lived in Shanghai _______________________. · 常见时间状语： 标志性词 具体用法 举例 for for+时间段 for two years / a long time since since+时间点 since 2017 / last year / half past ten since+时间段+ago since two years / a long time ago since+从句(一般过去时) since they moved to Shanghai · Practice: 用for/ since填空 ________Monday ________half an hour ________three months ________2005 ________12 o’clock ________three months ago · Oral Practice. 1. Q: How long have you worked in this re