2020-2021学年人教版英语八年级 (下册)Unit8 Have you read treasure island yet？Section A 2d&Grammar 4a -4c课件

Unit8 Have you read treasure island yet? Section A 2d&GF 4a -4c Have you watched this TV show? I have watched Dad,where are we going. The present perfect tense 现在完成时 Lead in Free Talk Let’s enjoy a video. The present perfect tense 现在完成时的构成 现在完成时的主要用法 与一般过去时的用法比较 现在完成时 一、基本结构 The present perfect tense sb have / has + done(动词过去分词) 助动词 （可以帮助构成肯定、疑问和否定句） 现在完成时 I made some food. Mom can enjoy it now. now past 现在完成时表示_____发生的事情对______造成的影响或结果。 过去 现在 I have made some delicious food for mom. 现在完成时态 I have watched theDad,where are we going. I have cleaned the classroom. 现在完成时态 Mandy & Mom I have finished . I have cleaned . I have made . I have finished . I have cleaned . I have made . all my homework all the rooms some delicious food Present Perfect Tense (现在完成时) Mandy said I have finished all my homework. So I can relax now. I have cleaned all the rooms. Now, the rooms are clean. I have made some delicious food. So mom can enjoy the food now. (一)现在完成时表示过去发生的动作或事情对现在造成的影响和产生的结果.它强调的是过去的动作与现在的联系.常用的时间状语有already,yet,ever,never,just, before(key words)等. 二、主要用法1 A: ______ your brother ________ his homework yet? (finish) B: Yes, he ‘s already done it. Key words Has finished yet already 注意：already 用于肯定句， yet 用于疑问句和否定句中 A: _______ you ever _______ to the park? ( be ) B: No, never. Key words Have been yet already ever never 注意： ever 曾经 用于疑问句中 never 从不 带有否定意义 I ______ just ________ the desk, you can take it to your classroom . (mend ) Key words have mended yet ever never just already Just 刚刚 与现在完成时连用 一般置句中 Just now 刚才 与一般过去时连用 I ______ _