八年级下册现在完成时讲解

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1、现在完成时 学习时态学习方法指导 时态:时:时间,态:动词的样子与状态 学习时态可以把握好时态概念后从 1.时间线索 2 动词形态变化 出发。 复习导入用适当的动词时态完成句子,并划出时间线索。 1 Tom always _(watch) TV at home every day. 2 They _(go) shopping two days ago. 3 Look! The girl _(dance) in the dancing room. 4 I _(reading) books at six oclock yesterday. 5 He _(go) to the movies in t

2、wo days. 从今天开始我们要学习一种新的时态, 期待吗?面对新的时态, 你准备好了吗?要学好这种新的时态,你觉得要突破新时态需要从哪几个方面出发呢? 1 新时态的( ) 2 新时态的( )3 新时态的( ) 现在完成时态导入 仔细观察下列 2 组句子 1. (1)I finished doing my homework yesterday.(时态:一般过去时,我昨天写完了家庭作业) (2)Hi,Mary, I have finished doing my homework . I can play now.(时态:_,我已经完成了我的家庭作业)现在做完了,暗含现在做完了现在可以玩了) 2

3、 (1) He lived here in 1991.(时态:一般过去时,他 1991 住在这里。 ) (现在不确定住这里) (2) He has lived here since(自从.以来) 1991.(时态:_,自 1991 年以来,他就已经住在这里。 ) (现在依然住在这里) 从以上的 2 组句子,我们可以发现一般过去时指的是动作发生在( ) ,但是我们这个新的时态不仅指动作发生在 ( ) 而且这个动作一直延续到( ), 还对 ( ) 产生了影响和结果,强调了( )的情况。所以这个时态不仅仅是动作发生在过去的时间点上,而且这个动作还会一直延续发生到( ) ,动作有个延续性,那么这个时态

4、我们叫做( ),这种时态翻译会加个“已经” 如: (现在完成时,动作发生在过去,但是动作会持续到现在,并对现在产生影响和结果) 过去 现在 恭喜大家已经突破现在完成时的概念,接下来我们来看看现在完成时结构吧! 现在完成时构成 主语+have/has +动词的过去分词。 (have/has 无实意,助动词,三单用 has) Eg: 我已经洗过碗了。(洗碗:do the dishes) I have (do 的过去分词什么?) the dishes. 动词过去分词变化 动词过去分词的规则变化和动词过去式的规则变化一样,一般加 ed, 以 y 结尾,改 y 为 i 再加ed,重读闭音节结尾,双写辅音

5、加 ed,如 stopped. 动词过去分词不规则变化:do 是不规则过去分词,是什么呢?( )请在课本 P136-137 找,这里有动词不规则的过去式(past tense)和过去分词(Past participle)变化,技巧是:死去活来, 牢牢记住后灵活运用。 希望大家能把136,137的动词的不规则过去式和过去分词牢牢记住,随身携带记忆,枕着睡最好。 现在完成时句式变化 I have gone fishing with Tom. 特殊疑问句式: 1 What have you done with Tom? 2 Who have you gone fishing with? 现在完成时用

6、法 (如何做题,找到时间线索词)思考:根据完成时特点,哪些词可以与现在完成时连用。 (1)already:早已(放在肯定句中或句尾。 ) I have already cleaned the room.= I have cleaned the room already. (2) yet: 1.已经(用于疑问句句尾) Have you cleaned the room yet? 2.还 (用于否定句句尾) I havent cleaned the room yet. (3) ever:曾经(常用于疑问句)Have you ever heard of(听说)the news? never:从不 I

7、 have never heard of the news. just:刚刚 I have cleaned the room just. (4)so far/ by now:目前为止 in the last/past few years:过去这几年到现在 recently:最近 表次数(once,twice three times): I have finished writing this book recently. I have read this book twice. I have read this book so far. She has learned about educat

8、ion in the past few years. *(5) for+时间段(时间长度) :长达多久时间 I have read this book for two hours. *(6) since+1.过去时间点 I have done my homework since 6 oclock last night. 2.过去时间 I have done my homework since last night. 3 过去时态的从句 I have done my homework since you came back. 注意:关于(5) (6) ,当时间是 since 和 for 引导时,

9、注意完成是的动词必须是延续性动词,为什么呢?( )对比下列三句找到答案。 I have already bought this book.() I have bought this book for two hours.() I have had this book for two hours.() 短暂性变延续性动词问题:have borrowed/lent(借)have kept(保管) have left(离开)have been away have died(死亡)have been dead have arrived(到达)have been in 将下列两句话用完成时合并成一句话,

10、提示 since+时间点 for+时间长度, 两句话哪个动词是延续性 I am in Beijing. I arrived in Beijing two days ago._. 改错: She has left for five hours.() 改为_ (为了更好理解现在完成时用延续性动词看到 P76 4a 练习) 练一练(用 since for ,用所给动词适当形式填空)提示:since+时间点 for+时间长度 1Mr.Li _(have)this TV_five years. 2 Tom _(read) this book _he was 7 years old. 3 They _(p

11、layed )basketball _two hours ago. (为了更好理解现在完成时用延续性动词看到 P76 4a) 肯定句 否定句 一般疑问句 肯定回答 否定回答 1 I have gone fishing with Tom. 2 He/she has gone fishing with Tom. 3They/We have gone fishing with Tom. 1 I have not gone fishing with Tom. 2 He/she has not gone fishing with Tom. 3They/We have not gone fishing w

12、ith Tom. (直接在 have/has 后加not) 1 Have you gone fishing with Tom? 2 Has he/she gone fishing with Tom? 3 Have they/We gone fishing with Tom? (直接将 have/has 提前句首) Yes, I have. Yes,he/she has. Yes,they/ we have. No, I havent. No.,he/she hasnt. No, they/ we havent. 自.以来 常错易考点 1 have/has gone to :去过某地(未回来,可

13、能还在路上) Where is your mother? She has gone to the supermarket. She will be back soon(已经去了超市但是还没回) 2 have/ has been to:去过某地(已经回来) I have ever been to China and I have been to Beijing twice. 3 have/has been in+地方:在哪里待了(多久) My father has been in Beijing for 9 years. 总结:1 现在完成时指的是_ 2 哪些词可以与现在完成时连用?_ 3 你认

14、为学习完成应该注意的知识点?_ 小试牛刀:翻译下列 2 组句子 闯关现在完成时 一、请同学们在 Unit 8,9,10 单元中找到完成时的句子用红笔划下来并在书中翻译。 二、单项选择 1. Both his parents look sad . Maybe they _whats happened to him . knew . have known . must know 2、The volunteers _a lot of help to the old since 2019. . offered . have offered . offer 3、The famous writer _ o

15、ne new book in the past two years is writing .was writing has written 4、Our country _ a lot so far . Yes . I hope it will be even _ . . has changed ; well . changed ; good . has changed ; better 5 、Zhao Lan _already _in this school for two years . was ; studying . will ; study . has ; studied 6、How

16、do you like Beijing? I have no idea. I _there. A have gone B have been C havent been 7、The police said:“The man _for a day.” A has died B has been dead C died 8、Mr Li, Tom isnt here. He _the office to ask questions . A has gone to B has been to C has been 三、完成对话 1 _? No, _.She has finished doing her

17、 homework. 2 _? _? They have worked for five hours. 3、I have broken the cup.(改否定句)_ 四、翻译 1 I ate the food two hours ago ._ Mom, I have eaten the food since two hour ago. 2 He lost his books ._ He has lost his 1 我们已经告诉 Tom 扫教室了。 2、Tom 已经睡了 8 个小时了。 3、Mary 自昨晚 10 点以来就在备考了。 五、试着完成 8,9,10 单元 grammar 和 self check 练习。 六、1.造句巩固现在完成时的过去分词变化。 (课上翻译写句子处) _ _ 2.造句巩固现在完成时句型变化。 _ 3.造句巩固现在完成时的线索词 。 _

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