What were you doing when the UFO arrived
八年級英語（下）學案15課時
課題：unit3 what were you doing when the ufo arrived? section b
勵志小木屋：today must borrow nothing of tomorrow.今日事今日畢。
預習目標：1、知識目標：
2. 能力目標：1）.能聯(lián)系上下文理解課文 2）.能談論過去發(fā)事情
3）.能利用情景思維 3.情感目標：熱愛科學，探索科學。
預習重點：while, when引導的時間狀語從句，過去進行時
預習難點：while, when引導的時間狀語從句，過去進行時
一、自主預習：（一）預習任務： task1. 英漢互譯：
climb a tree_______ be too scared_______ at the doctor’s _____________outside the house _______ 跳下_______ 逃跑，跑開 ____________在火車站_______ 喊某人的名字 _______
task2、通過預習3回答問題
(二)預習診斷：下列各句均有一處錯誤，請指出并改正
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)預習反思：do you have any question?
二.課中實施：
step1.預習交流 step2. warming-up step 3: lead- in step4 practice
step 5 精講點撥: what happened while linda was on the telephone?
琳達打電話時發(fā)生了什么？
happen 常指具體事件的發(fā)生，特別指那些偶然的或未能預見的事件的“發(fā)生”eg: a car accident happened yesterday.昨天發(fā)生了一場車禍。
如果表示“某人發(fā)生了某事”，常用結(jié)構(gòu)“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：詞的適當形式填空
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、 限時作業(yè) （每空一分，共10分） 得分率______
選擇 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