八 年级导学案
授课时间： 2012年 3 月 18 日
姓名 班级 审核人签字
审核日期
课题 Unit3 What were you doing when the UFO arrived? (Section A)第一课时 课型 新授课
执笔者 参与者
Ⅰ、Teaching Aims: 1.学习过去进行时的基本结构及典型句型。
What were you doing when the UFO arrived?
2.学会简单描述过去发生的事情。
3.学会讲简单的故事。
Ⅱ、Teaching Difficulties:1.while与when的用法。2.学习过去进行时的基本结构及典型句型。
Ⅲ、Teaching key points: 1.while与when的用法。2.学习过去进行时的基本结构及典型句型。
Ⅳ、预习交流：翻译下列单词及词组
1、理发店 __________________ 2、出去,离开 __________________ 3、 起飞 __________________
4、在图书馆前面 _________________ 5、 睡过头,起得晚 ________________ 6、做晚餐 ________________
7、理发 __________________ 8、在电话上交谈 __________________ 9、制作牛奶奶昔 __________________
10、吃午饭 __________________ 11、浴室__________________ 12、卧室__________________
Ⅴ、知识梳理：
一、过去进行时：表示在过去某一时间内正在进行的动作。
构成：was / were + 现在分词（其中was是am、is的过去式，were是are的过去式）
e.g. I was doing my homework then . 那时，我正在做作业。
用法：1）过去进行时表现过去某一时刻正在进行的动作。
e.g. She was writing a letter when I came in .我进来时，她正在写封信。
2）过去进行时还表示过去某阶段正在进行的动作。
e.g. They were waiting for you yesterday .他们昨天一直在等你。
二、过去进行时与一般过去时的区别:
过去进行时：表示正在进行的动作。
I was reading a novel last night.昨晚我在看小说。（可能还没有看完）
一般过去时：表示一个完成的动作。
I read a novel last night .昨晚我看了一本小说。（已经看完了）
二、以when和while引导的时间状语从句
1）延续性动词指动作可以延续一段时间，而不是瞬间结束。如：work,study,drink,eat等。
2）非延续性动词指动作极为短暂，瞬间结束。如：start,begin,arrive,jump,go, finish,borrow,knock等。
when表示“当……的时候”。它后面既可跟延续性动词，又可跟非延续性动词.
如：Mary was having dinner when I saw her .(当我看到玛丽的时候,她正在吃饭.)
while表示“在……的时候”、“在……期间”。while后面必须是表示动作或状态的延续性动词。
如：The weather was fine while we were in Beijing .(当我们在北京的时候天气很好.)
所以, when可指时间点，又可指时间段，从句中可用延续性动词，也可用非延续性动词。
while总是指一个时间段，从句中必须用延续性动词。
Ⅵ、合作探究：
1.小组合作看图1a ，讲故事。谈论图中发生的故事。
2.小组合作完成1a 。
3.听力提高，认真听录音完成1b, 复述重点句型，理解熟记词汇句型。
4.小结本节课学习的过去进行时基本结构及while与when的用法。
Ⅶ、展示分享：
小组运用while与when讲述过去发生的故事，巩固过去进行时。
Ⅷ、课堂练习：一、单项选择
（ ）1. Tom was writing a letter ___________ I called him.
A. while B. when C. because D. after
（ ）2. The plane will ___________ in a few minutes.
A. take off B. put off C. take out D. get out
（ ）3. The man followed the boy ___________ what he wanted ___________ in the room.
A. to see, to do B. to see, do C. see, to do D. see, do
（ ）4. The accident happened ___________ the morning of September 12.
A. in B. on C. at D. for
（ ）5. The driver sits ___________ the car.
A. in the front of B. in front of C. in front D. at the front
（ ）6. ___________we got home, it was 10:00.
A. While B. When C. Although D. If
（ ）7. We find ___________ interesting to see English movies.
A. it B. that C. this D. that’s
二、用所给单词的适当形式填空
1.Mary ofen ______up at six o'clock. But she _______(not get)up at this time yesterday.
2.When I came in, Alice _________(lie)in bed.
3.________(not be) late again. Please get to school on time.
4.The plane__________(take off) a five minutes ago.
5.While the reporter_________(take) a photo, the cat climbed the tree again .
三、用while或when 填空
1.The girl was shopping ________the alien got out.
2.______ the girl was shopping ,the alien got out.
3.I was doing my homework ________my mother came in.
4.______I was doing my homework ,my mother came in.
5.He called to see me _________I was looking for my bag.
6.________we were talking ,Dad got home.
7.________I was sitting in the barber's chair , my friend phoned me.
8.The Greens were having dinner ________ I visited them.
9.What did you do ________ the UFO landed?
10._______I arrived at the airport , the plane was taking off.
Ⅸ、布置作业
练习册阅读理解
Ⅹ、教学反思：