1.Have you seen any traffic accident? 2. What do you think of those traffic accidents? 3. What do you think often causes traffic accidents?4. What should you do when you see a traffic accident?Read the story quickly and find out what happened. 1.What were the children doing at the time of the accident? 2.They were leaving school. 3.2. What happened suddenly? 4.One of the bags fell of the bag. 5.3. What did they hear when they were running to move 6. the bag of rice? 7. They heard the sound of the motorbike. 8.4. Was the man on the motorbike traveling fast? 9. Yes, he was. 10.5. What happened then? 11. His bike hit the bag of rice and he fell off the bike. 12.6.Was the man badly hurt? 13. No, he wasnt.7. Whose room did the two boys carry the man to?8. What did the gate keeper ask the children not to do?9. Where did Li Lei find Miss Zhao?10. What was she doing when Li Lei told her about theaccident?11. What did she do after after she heard about the accident?12. What did she ask Li Lei to do?The school gate keepers room.He asked the children not to crowd round the man.In the school library.She was choosing a book.As quickly as she could, Miss Zhao got a medicine box.She asked Li Lei to go to the school office and callthe police.Some important sentences:1. Lets move the bag, or it may cause an accident.咱们一起搬开这个口袋，不然会出事故 祈使句or句子，其中的祈使句常用来表示一种条件在意义上相当于由引导if的含有否定意义的条件状语从句例如： Be careful with your bag ,or it will be lost. If you arent careful with your bag, it will be lost. Speak louder, or nobody can hear you. If you dont speak louder, nobody can hear you.Dont crowd round him.别围在他的旁边 Crowd在这里是动词，它也常常用作名词，“人群”，“一大堆”的意思 如：There was a crowd of people at the theatre, hoping to get the tickets.3.Its really nice of you. 你们真好在赞扬某人善良，人品好时，英语一般不说You are verygood/kind/nice,而是说Its nice /good /kind of you.如： Its very kind of you to help me. Its very good of you to tell me.Its + adj +of sb. to do sth. Of 前的形容词往往与sb构成逻辑上的主 系表结构，常见的形容词为kind, nice, careful, careless, foolish 等 如： Its too careless of you to make such a mistake.可以说：Youre careless. Its + adj +for sb. to do sth. For前的形容词往往不能与sb构成 逻辑上的主系表结构，常见的形容词为 hard/difficult/easy/important/necessary/impossible.如： Its important for us to learn a foreign language well.不能说： Were important.Retell the story .The children _ _school when they saw a truck. _ one of the bags_ _ the truck. It landed _in the middle of the road. A man on the _ was driving too fast.His motorbike _ the bag of rice and he _ _his bike._,he was not badly hurt. Li Lei and Jim _ the man to the school _ room and the girls went _the corner to stop the _. The gatekeeper and Lin Tao moved_ the bag. Then Li Lei went_ the school and told Miss Zhao about the_. With a _box under her arm Miss Zhao_ off to look_the man. At the same time Li Lei _ the police.Exercises: Fill in the blanks with proper prepositions. 1. Well see a film _ Wednesday. 2. When I was coming _ the corner, I fell _ the bike. 3. The pen landed_ the floor. 4. Dont shout _ your parents. 5. I often heard the sound _ a bird. 6. He was driving _ his motorbike. 7. Will you please carry the books _ the library? 8. Its really nice _ you to help me. 9. Dont crowd _ the injured person. 10. Please move _ your cases. 11. With a big smile _ the face, she passed me the key. 12. Please look _ yourself.