8B-Unit1-Grammar-教学案

1、陆井中学八年级英语教学案 8BUnit 1 Past and present课题：Grammar （第五课时） 日期： 主备: 审核: 班级：_ 姓名：_ 【目标导航】1. 识记动词的过去分词形式2. 能够在语境中正确的使用现在完成时并与一般过去时区分3. 理解并运用常与现在完成时连用的时间表达方式【课前预习】同学们，课前预习是一个很好的习惯，预习做的好，课上就更加轻松。请预习课本P13-17页，翻译下面的词组，并且在书上将这些短语用蓝色笔 划下来。1.从他出生以来 _ 2.没有东西吃 _ 3.玩过这个游戏好几次_ 4.修理过十多辆自行车_ 5.谈论有关北京历史的展览 _ 6.在历史博物馆 _

2、7.忘记标题 _ 8.过去一个世纪北京的变换_ 9.最近很忙 _ 10.知道许多关于北京现在和过去的情况_ 11.决定再去看一次 _ 12.感冒（两种写法） _ _ 13.收到她的来信 _ 14.乘飞机旅行 _ 15.这个夏天飞往三亚 _ 16.住在这里时间很短_ 17.在那里呆一整周 _ 18.享受阳光和沙滩 _19.事实上 _ 20.顺便说一下 _【教学过程】. Pre-task Ask some questions: How long has Mr Chen lived in Sunshine Town? When did Mr Chen get married? There have

3、been many changes in this town. What has the centre of town become? How does Mr Chen feel from time to time? .While-taskPresent the sentences according to the answers to the questions:He has lived in Sunshine Town since he moved there with his family when he was two years old.It has become a park.As

4、k some more questions: T: Do you remember Eddie? S1: Yes.T: Millie is Eddies master. Eddie was born four years ago. Eddie has lived with Millie since he was born. How many years has he lived with Eddie? S2: For four years.T: Yeah, Eddie has lived with Millie for four years.（板书）Task 1：Let the student

5、s know that the sentences on the board all include the present perfect tense. Tell the students: We use the simple past tense to talk about what happened at a definite time in the past, like “Eddie was born four years ago”. We use the present perfect tense to talk about things that started in the pa

6、st and still have some connection with the present, like Eddie has lived with Millie since he was born. Eddie has lived with Millie for four years.Task 2: We make positive and negative sentences using the present perfect tense like this.subject have/ has+ (not) past participle I/You/We/They have (no

7、t) moved. He/She/It has (not) moved. We form the present perfect tense by adding have or “has” before a past participle. e.g. have/has + seen/ done/ sung/, etc.Task 3：Tell the student how to write the past participle of verbs.1) We add -ed to regular verbs. （板书SeePage14） 2) We form the irregular ver

8、bs differently. We do not add -ed. Ask the students to look at the table of irregular verbs on Page 121. Ask the students to remember the past participle of irregular verbs.Task4：Ask the students to finish the exercise on page 14. Ask them not to forget the verb have/ has. Present the Present perfec

9、t tense briefly. Subject + have/has+ past participleTask 5：Teach the students how to ask and answer questions using the present perfect tense. e.g. Have you arrived? Yes, I have. / No, I havent. Has she left? Yes, she has. / No, she hasnt.（板书）The teacher asks the students some more questions.Task6 C

10、hat time：Millie and Sandy are talking about an exhibition of the history of Beijing. Complete their conversation using the correct forms of the verbs in brackets. 1) Give them several minutes to complete it. 2) Check the answers with the whole class.3) Ask some pairs to act out the conversation . Po

11、st-task 分清一般过去时与现在完成时I cleaned the blackboard half an hour ago （只说明“擦”和其发生的时间)I have cleaned the blackboard. （说明现在黑板是干净的）总结: (1) 一般过去时只表示过去的动作或状态, 和现在不发生关系。(强调动作发生的时间)现在完成时表示过去发生的某一动作, 对现在造成的影响,强调的是现在。(侧重动作的结果)True or False: The train has arrived just now. _ The train has just arrived. _ She has ret

12、urned from Paris yesterday. _ She has returned from Paris. _总结: (2) 一般过去时常与表示过去的时间状语连用, 如:yesterday, last year, three days ago, just now,等。 现在完成时不能和表示过去的时间状语连用,其时间状语往往是since, for, just, ever, never, before, already, yet , so far等或无时间状语。 Present some typical time expressions: already 一般用于肯定的陈述句yet 一般

13、用于否定句和疑问句 (否定句中常译为“还”；疑问句中常译为“已经”。)just 刚（注意与just now的区别） recently 近来 ever 曾经(常用于问句) never 从不up to now till now over/in the past 10 years so far before(句尾且不加时间) eg. Have you visited our city before? do the exercises on page 17 and check the answers. Sum up: What weve learnt today?【知识点辅助】 考点 1：现在完成时的用法和构成阅题笔记： 知识点拨助动词要随着主语的变化而变化，当主语是第三人称单数时，助动词要用has。 混淆点拨一般过去时只强调在过去的时间里所做的动作，不表示对现在的影响。 方法点拨判断是否用现在完成时的几个要素：1. 强调动作是过去发生的2. 强调对现在的影响或结果3. 在过去不确定的时间里发生的动作，但是其结果对现在有影响。易错点拨yet与