现在完成时讲解课件2021-2022学年人教版英语八年级下册

Unit 8 现在完成时 1 We have learned English for two years. 我们学英语两年了。 “学英语”是发生在两年前的动作,一直持续到现在,将来可能还要继续学习。 now 2 years ago in the future 一、概念:表示过去发生的事情对现在造成的影响影响还有可能继续下去。 2 We have lived in Nannan for 3 years. three years ago now 助动词have/has+过去分词 现在完成时 I have washed clothes. 我洗衣服了。 I have cleaned all the rooms.我打扫了所有的房间。 I have made some delicious food. 我煮了些美味的食物。 二、结构: Mary (have/has)finished her homework. She made some delicious food. She cleaned the rooms. has has has 现在完成时:has+过去分词 第三人称单数 5 He not has They have cleaned the rooms. 现在完成时的句型转换 思考 否定句在_后面加not。 not finished his homework. have或has have not = haven’t has not = hasn’t 现在完成时的句型转换 They have cleaned the rooms . He has finished his homework . Have ? they Has ? he 思考 一般疑问句把_提至主语前, 回答时,要使用_. have或has 主语+have或has —Yes, they have. No, they haven’t. —Yes, he has. —No, he hasn’t. 1. wash - _ - _ 2. learn - _ - _ 3. live - _ - _ 4. teach - _- _ 5. finish - _ - _ 6. clean - _ - _ lived finished cleaned 请写出下面动词的过去分词。 washed learned/learnt taught finished learned/learnt washed lived taught cleaned Review 写出下列动词的过去式和过去分词。 1.be- 2.come- 3.go- 4.do- 5.have- 6.drink- 7.give- 8. eat- was/were -been came-come went-gone did-done had-had drank-drunk gave-given ate-eaten 三. 现在完成时的标志词 1. 现在完成时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。(汉语中常用“已经”、“过了”等表达)通常与just,yet, already, before, never, ever 等时间状语连用。 2.时间副词在句中的位置 要放在have/has 的后面,实意动词的前面, 但yet 要放在句尾,用于否定句和疑问句中。 already可以用于疑问句的句尾,表示惊讶 1. Have you watered the plants_?(疑问句) Yes, I have _watered them.(肯定句) 2. Have you finished your homework_? (疑问句) Yes, I have _finished it. (肯定句) 3. Have you read this book_? (疑问句) No,I haven’t read it _.(否定句) Not _.(否定句) yet already yet already yet yet yet 3、 (1)现在完成时+ for +一段时间 例:我好久没有见到她了。 I haven’t seen her for a long time. (2)现在完成时+ since +表示过去的时间点 例:自1984年以来,史密斯先生就在这里工作。 Mr. Smith has worked here since 1984. 状元成才路 状元成才路 状元成才路 状元成才路 (3)现在完成时+since+从句(过去时) 例:自上大学以来他学了大约5000个英语单词。 He has learned about 5000 English words since he went to college. 谓语动词用延续性动词,可以用how