复习目标：
１．Words and useful expressions in this unit.
2. Talk about past events .
重难点: 过去进行时
一．课前预习：
Read through this unit and finish these exercises :
Task 1. Words in this unit :
1 外星人__________ 2 当…时候 ___________ 3 经历__________ 4 想象________ 5 跟随 ________ 6 令人惊异的____________ 7 发生_____________
8 事故_________ 9 现代化的__________ 10 意思 ____________11 buy(Vp.)_______
12 ride(Vp.)_______ 13 run(Vp.)________ 14 meet(Vp.)_________
15 hear (Vp.)_________ 16 ring(Vp.)_________ 17 tell (Vp.)_________
18 become (Vp.)_________ 19 fly (Vp.)_________ 20 hero (pl.)___________
Task 2 Phrases in this unit :
1一个不明飞行物 ____________2 一个理发店 ____________3 在中央街上着陆
_________________ 4 从飞碟里出来__________________5有一个非常不寻常的经历
_____________________________ 6 在火车站 ____________________
7 逃跑_____________ 8 进来_____________9 听说 __________10 像…一样_________
Task 3 完成句子：
1. ----What ______ ______ _________(正在做什么)when the UFO arrived ?
---- I was ________ ______ _______ _______ ____ _______(站在图书馆的前面).
___________ __________(睡懒觉) .
_______ _____ _______ _____ ________(从浴室里出来) .
___________ _________(理发) .
2. The alien ________ ______ __________ ______ __________(参观了航空博物馆).
3. An alien _________ _________ _______ ________ ________(从飞碟里出来).
4. The boy was ________ ______ ______ ________(在街上走)when the UFO arrived .
5. 正当这个女孩购物时，飞碟出来了。
_________ the girl _______ _________ , the alion ________ ___________ .
6. I _____ _____ ______ _________ ________(有一个非常不寻常的经历)on Sunday .
7. 我在街上走的时候这时一个飞碟正好在我前面着陆。
I was ________ ______ the street when a UFO _______ _____ ______ ______
________ _________ .
8. An alien ________ _______（出来）and ________ _______ ________ ________
(沿着中心大街走) .
9. 当它进入礼品店时我非常惊讶。
I ________ very ________ when it ________ ________ ______ ________ _______ .
10. 当Linda 在火车站买报纸时，狗从他的箱子里出来跑掉了。
While Linda was ________ _______ __________ at the train station , the dog _____
______ _____ his box and _________ _________ .
11.While she _______ ________ ________ _______ ________(在讲电话时)，Davy
met another dog outside the station .
12.While the police ______ __________(come), Linda _________ _______ ________
________(沿着车站来回走) and _______ ________ ________(叫着Davy的名字).
预习质疑：___________________________________________。
二．课中实施
While the alien was visiting the museum ,the boy called the TV station .
翻译：__________________________________________________________
精讲：while 作连词，意思是____________ ,相当于during the time .只能表示时间短，
因此从句中的谓语动词是____________ .
1. 主句谓语动词与while 引导的从句谓语动词所表示的两个动作往往是同时进行。
如：I was doing my homework ,while my mother was cooking dinner .
___________________________________________________________________
2. 主句的动作发生时， 从句的动作正在进行。
如：While he was playing computer games , his father came in .
__________________________________________________________________
系统总结：
本节课我学会了__________________________________________________
三．限时作业（10分）
1. W________ the boys were planting trees , the girls were carrying water .
2. ---- What’s the m__________ of the word ?
----- It means “go on” .
3. Yong people today need to e___________ different things .
4. She hoped nothing bad would _________ him .
A . happen B .take place C . happen to D . take place of
5. I ________ in the street when it began to rain .
A . running B. walk C. is running D. was walking
6. When his mother got home , he ________ computer games .
A . plays B .playing C. is playing D . was playing
7. Lucy 在弹钢琴时，她妹妹在伴舞 。
________ Lucy ________ ________ the piano , her sister was _________ .
8.那个小狗从盒子里出来，逃跑了。
That dog _______ _______ ______ the box and _______ ________ just now .
9. I was swimming when the UFO landed .(提问)
_________ _______ you __________ when the UFO arrived ?
10. He was writing at 9:00 yesterday morning .(用reading 改为选择疑问句)
________ he _________ or _________ at 9:00 yesterday morning .
课后作业: Prepare Unit 4.
