Unit10现在完成时课件2022-2023学年人教版八年级英语下册

The Present Perfect tense present(now) future past Present Perfect Tense present(now) future past Present Perfect Tense 回顾 ------------------------- 表示过去的某个动作对现在造成的影响 表示过去到现在的时间段内重复的动作 表示过去发生的动作或状态一直持续到现在 站在现在，回顾之前。 主语 + have/ has + 过去分词（pp） 助动词,无意义 现在完成时的结构 Autumn has come. 主语 + have/ has + 过去分词（pp） 主语 + haven’t ( have not ） +过去分词 主语 + hasn’t ( has not ) +过去分词 疑问句 把助动词 have / has 放在句首 现在完成时的结构 否 定 形 式 一 般 疑 问 句 注：主语若是第三人称单数助动词用 has 1) 表示过去发生的动作对现在造成的影响或结果。 常与already(已经), yet(已经), just(刚刚), never（从不），ever(曾经)等词连用. Someone has broken the window. (窗户现在是坏的) I have already lost the key. (我现在没有钥匙) I haven’t read that book yet . (不了解书的内容) I have just cleaned my hands. (手是干净的) 2) 表示过去到现在的时间段内重复发生的动作。 I have taken three tests this week. I have read this novel three times in the past months. 3) 表示过去发生的动作或状态持续到现在，常与“for+一段时间“或”since+过去的时间点/一段时间+ago/表示过去的一句话“连用。此外还有so far/up to now/until now等等连用。 She has learned English for 5 years. He has lived in Beijing since 5 years ago. He has been busy since last week. I have taught English since I came here. 用for 或since填空 Mr. Brown has had his TV ______ 15 years. I’ve taken driving lessons _______last month. My sister has had her cell phone ______a month . My friends haven’t visited me ______few days ago. We haven’t used our car _____ a long time . She hasn’t had a good cup of coffee _____years. Tom has worn glasses _______he was 7 years old. for since for since for for since 注：并非所有for作为时间状语的句子都用现在完成时 搞清一般过去时和现在完成时的区别 I worked here for more than twenty years. (我现在已经不在这里工作了) I have worked here for more than twenty years. （现在我仍在这里工作） 疑难点 一般过去时VS现在完成时 一般过去时 现在完成时 侧重点在于陈述过去的动作或状态， 动作已经结束，并与现在没有联系 强调动作或状态已经发生了， 并且对现在带来了影响或结果 与具体的时间状语连用 （yesterday,last year,一段时间+ago...) 与模糊的时间状语连用 (just,so for,before....) I ate just now. (过去吃的，现在饿不饿没有强调） I have just eaten. (过去吃了，现在还饱着，不想吃了。） Nancy has taught us English for 8 years. (现在可能还在持续教） N