WhatampnbspwereampnbspyouampnbspdoingampnbspwhenampnbsptheampnbspUFOampnbsparrived

　　八年级英语（下）学案15课时
　　课题：unit3 what were you doing when the ufo arrived? section b
　　励志小木屋：today must borrow nothing of tomorrow.今日事今日毕。
　　预习目标：1、知识目标：
　　2. 能力目标：1）.能联系上下文理解课文 2）.能谈论过去发事情
　　3）.能利用情景思维 3.情感目标：热爱科学，探索科学。
　　预习重点：while, when引导的时间状语从句，过去进行时
　　预习难点：while, when引导的时间状语从句，过去进行时
　　一、自主预习：（一）预习任务： task1. 英汉互译：
　　climb a tree_______ be too scared_______ at the doctor’s _____________outside the house _______ 跳下_______ 逃跑，跑开 ____________在火车站_______ 喊某人的名字 _______
　　task2、通过预习3回答问题
　　(二)预习诊断：下列各句均有一处错误，请指出并改正
　　1. the child was shopping while she saw the alien get out.
　　2. grandma was cooking breakfast when i was washing my face this morning.
　　3. i read a history book when someone knocked at the door.
　　4. what did you do at ten o’clock last sunday morning?
　　5. while the alien was in the museum, i was calling the tv station.
　　6. you can imagine how strange was it!
　　(三)预习反思：do you have any question?
　　二．课中实施：
　　step1.预习交流 step2. warming-up step 3: lead- in step4 practice
　　step 5 精讲点拨: what happened while linda was on the telephone?
　　琳达打电话时发生了什么？
　　happen 常指具体事件的发生，特别指那些偶然的或未能预见的事件的＂发生＂eg: a car accident happened yesterday.昨天发生了一场车祸。
　　如果表示＂某人发生了某事＂，常用结构＂某事+happen(s) +to+某人＂
　　eg: an accident happened to tom yesterday.
　　sb. happen to do sth. ＂某人碰巧干某事＂
　　step 5 拓展延伸：词的适当形式填空
　　1.he ____ for me in the park yesterday.
　　2.i ___ when i saw a thief in the supermarket.
　　3.he saw an alien___ the ufo.
　　4.he____ some fruit from the fruit shop yesterday.
　　5.the girl_____ dinner when her mother came back.
　　step 6 summary
　　三、 限时作业 （每空一分，共10分） 得分率______
　　选择 1. there is a bird singing____ the green tree. a. in b. on c. into
　　2. the leaves____ the tree are getting yellow. a. in  b. on c. into
　　3. i can’t find my dictionary_____.
　　a. somewhere b. anywhere c. nowhere d. not where
　　4. i ____ a book when he came in.
　　a, am reading b. am looking c. was reading d was looking
　　5. ____ coming to ask something about the car accident.
　　a. a police is b. the police c. the police is d. the police are
　　6.. what were you doing when your father ____ back from work?
　　 a. was coming b . comes c. came d. is coming
　　7. masha____ when the doorbell____. a. is cooking, ring　　 b. was cook, rang　 　c. was cooking, rang d. cooked, rang
　　8. what____ while linda was on the telephone?
　　a. was happened b. was happening c. happened d. happens
　　9. ——what_____ you, tim? —— i failed my test. a. happened b. happened to c. was happening to d. was happened
　　10. did you find your keys____?
　　a. somewhere b. anywhere c. everywhere d. nowhere
　　homework: 句型转换
　　1.i was playing the guitar at this time yesterday？(划线提问)
　　_____ _____ you _____ at this time yesterday?
　　2.she washed clothes last night.(改过去进行时)
　　she _____ _____ clothes last night.
　　3.he is looking at the souvenirs now. (用now 改写)
　　he ____ ____ at the souvenirs ____ _____ _____.
　　4.you’d better go to see her tomorrow.( 改否定句)
　　you’d ___ _____ ____ to see her tomorrow
　　5.i think there’s something interesting in his story.( 同4)
　　i_____ ____ there’s _____ interesting in his story.
　　学后反思：