北师大版 英语课件：八年级下unit 8 transportation

课件11张PPT。Unit 8 Transportation一、本周教学重点：
1. must, mustn’t , have to, don’t have to 的用法。
2. 祈使句表示禁止。
3. 重点词组的学习。二、具体内容：
（一）1. must, have to 表示某事必须做，两者表达意思一样。
??? e.g. You have to ride on the right. = You must ride on the right.
? 2. 但在问句中，have to 更常见。
??? e.g. Do you have to drive on the right side of the road?
? 3. mustn’t 表示做某事是错误的或违法的，没有选择的余地，意为“禁止……”。而don’t have to 表达做某事不是必须的，我们可以选择，意为“不必”。
??? e.g. You mustn’t park in spaces for disabled people.
?????? You don’t have to have a driver’s license to ride a bicycle.Read the following sentences.
You mustn’t ride on the sidewalk.
You have to know how to stop safely!
You must always remember to lock your bike.
You have to wear light-colored clothes.
You must give way to pedestrians.You have to have lights on your bike.
You mustn’t give rides to other people.
You must check the brakes and the tires.
You have to obey all traffic signs and rules.
You mustn’t do tricks on your bike.
You must wear a helmet.（二）祈使句表示禁止。
省略主语，以动词原形开始的句子叫祈使句。
e.g. Give me a hand, please.
??? Don’t open the door.
Read and complete the leaflet with the headings from the box.
A. Rules for motorcyclists??? B. Rules for cyclist??
C. Rules for pedestrians????? D. Rules for drivers课堂练习：
I. 用must, mustn’t 填空。
1. You ____ check that your bike is in good condition.
2. You ____ ride on the sidewalk.
3. You ______ obey traffic signs.
4. You ______ give rides to other people. It’s dangerous.
5. You _______ to know how to stop safely.
6. You _______ give way to pedestrians.II. 完成句子。
1. 开车时不要打电话。
Don’t______　______ _____ while you are driving.
2. 我们周日不必去上学。
We ______ _____ _____ go to school on Sundays.
3. 你不必打车去。
You _____ ____ ____ take a taxi.4. 红灯亮时，你必须停车。
When the traffic lights ______, ______, you ____ _____ your car.
5. 在环路上开车时，不必等交通灯。
When you drive along the ring-roads, you _____ ______ _____ wait for the traffic lights.6. 不要在街上踢球，很危险。
You _____ ______ _____ in the street. It’s dangerous.
7. 他的妈妈病了，他得在家照顾她。
His mother is ill. He _____ _____ look after her at home.Good-bye!