Properties: Recorder, Overhead projector
Teaching Procedures:
I. Revision
T: Let the students do translation exercise:
1．他们学校就在这条街的尽头。
Their school is at the end of the street.
2．在这条街的街头是一个饭店。
At the head of the street is a restaurant.
3．当你等公共汽车时，你必须排队等候。
You must wait in line when you wait for a bus.
4．会议上的每个人都因演讲人的错误而笑了。
Everybody at the meeting laughed at the speaker’s mistake.
5．如果你不小心，小汽车就可能撞着你。
If you are not careful, a car may hit you.
II. Leading-ill
T: Show the students the sentences from Exercise Two, write them down on the blackboard, and underline some important words.
1. You should be quiet when you are in the reading room.
2. When I grow up, I’ll be a nurse and look after patients.
3. If you don’t want to go alone, I’ll go with you.
4. After you use plastic bags, you mustn’t throw them about.
5. People in the US can’t drink beer or wine before they reach 21 .
T: Ask the students to read the sentences and Jet them discover the language point.
III. Practice
T: Tell the students to make familiar sentences according to Exercise Two.
For example:
1. You should be quiet when you are in the hospital.
2. When I grow up, I’ll be a teacher and teach students.
3. If you don’t want to do the cooking, I’ll do it.
4. After you use the toilet paper, you mustn’t throw them about.
5. People in China can’t drive before they reach 18.
IV. Teaching grammar
T: 时间状语从句由when, before, after等连词引导，时间状语从句中不使用一般将来时，而用一般现在时代替一般将来时。
For example:
1. She began to feed her dog when she got home.
2. Don’t tell them the keys before they take the exam.
3. I went out for a walk after I had supper.
4 .She waits until the patients are quiet.
5. He’ll go to America when he finishes his work.
T. 条件状语从句由if（如果）来引导，在条件状语从句中不用一般将来时，而用一般现在时来替代。
For example:
1. He’ll fall behind the other students if he misses too many lessons.
2. If you feel sick, you must see the doctor at once.
3. They will go to the park if the lain stops.
4. Try to finish it if you like.
5. If I have enough time, I’ll go with you.
V. Practice
T: Look at the Exercise Three in the students’ book. Ask the students to complete the sentences.
Teachers had better give them some examples if necessary.
For example:
1. If it rains, ______________.
(1) If it rains, he will stay at home.
(2) If it rains, we won’t go to the park.
2. If you smoke, _____________.
(1) If you smoke, your body will become weaker and weaker.
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