Unit3WhatwereyoudoingwhentheUFOarrived教学设计.doc
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Unit 3 What were you doing when the UFO arrived ?
Teaching goals:
1. Words : barber shop , well , bathroom , accident , earth , silence , playground , around , strange , kitchen , modern , follow , shirt .
2. when , while 引导的时间状语从句。
3. 学习过去进行时态。
4. 利用知识谈论过去发生的事情。
5. 复习过去式，学会讲故事。
6. 了解一些自然科学知识和社会科学知识。
Important and difficult points:
1. when, while 引导的时间状语从句。
2. 学习过去进行时态。
Teaching aids: a tape-recorder, cards.
Period 1
Teaching procedures:
Step 1 Leading in
1. Greetings and free-talk.
2. Check the homework.
3. Dictate the words in Unit 2.
Step 2 Pre-task
SB Page 18, 1a.
1. Point to the sentences .Read the sentences .Explain what each one means.
2. Look at the picture .Point out the six people .Match the statements with the people in the picture.
3. Check the answers.
4. Practice reading.
Step 3 While-task
SB Page 18, 1b.
1. Read the instructions .Make sure the Ss understand what they should do.
2. Look at the dialogue in the picture.
Explain:
I was standing in front of the library when the UFO arrived.
过去进行时态
过去进行时态的构成: was / were + doing.
用法: 表示过去某一时刻或某一段时间正在进行的动作，一般用时间状语来表示。
一、过去进行时的主要用法是描述一件事发生的背景；一个长动作发生的时候，另一个短动作发生。常用的时间状语this morning, the whole morning, all day yesterday, from nine to ten last evening, when, while例如：
We were watching TV from seven to nine last night.
昨天晚上七点到九点的时候我们在看电视。
What was he researching all day last Sunday?
上周日他一整天都在研究什么？
My brother fell while he was riding his bicycle and hurt himself.
我哥哥骑自行车的时候从车上摔下来，受伤了。
It was raining when they left the station.
他们离开车站的时候天正在下雨。
When I got to the top of the mountain, the sun was shining.
当我到达山顶的时候，阳光灿烂。
二、 过去进行时可以表示在过去某个时间点发生的事情。时间点可以用介词短语、副词或从句来表示。如：
What was she doing at nine oclock yesterday?
昨天晚上九点她在做什么？ (介词短语表示时间点)
When I saw him he was decorating his room.
当我看见他的时候他正在装饰房间。 (when从句表示时间点)
三、 在复合句中，如果主要动作和背景动作都是延续的或同时发生的，那么主从句的动词都可用过去进行时。例如：
While he was waiting for the bus, he was reading a newspaper.
他边等车边看报。 (两个动作都是延续的)
He was cleaning his car while I was cook
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