Unit 4 Road safety(2) Let’s play. 游戏规则：两组学生进行交通规则对抗赛，每次每组派一人说一个交通规则，在老师规定时间内哪组说的多，哪组获胜。Let’s talk. How can we cross the road safely? What must we not do on the road? Rule 1Rule 2Rule 3Retell the story.复述故事 1 、同桌相互讨论 , 边讨论边复述。 2 、能流利复述的同学可得到两颗星。Grammar timeLet’s review these..Let’s read.Howcan youcross the road safely?Whatmustnot do on the roadRule 1: We must look for a zebra crossing, then we must look at the traffic lights.Rule 2: We can wait on the pavement.Rule 3: We must not run or play on the road.Let’s read.You mustlook for a zebra crossing.look at the traffic lightsmustn‘tplay football on the roadrun on the roadYou canwait on the pavement.cross the road with other peoplecan‘tcross the road herecannotfind a zebra crossing情态动词动词原形mustn’t=must notcan’t=cannotLet’s learn.We must stop.We can go.We should wait. 等待We mustn’t go. 情态动词can 的意思是“可以…”。 should 的意思是“应该…”。 must 的语气最强，意思是“必须…”， mustn’t 的意思是“禁止…”通常用于法律法规的要求。Let’s learn.must （一定）will （很有可能）would （很有可能）ought to （应该，很有可能）should （应该，很有可能）can （可能）could （可能）may （可能）might （可能） 常见情态动词（按语气从强到弱依次为）：Let’s say.We can\should\must…We can’t\shouldn’t\mustn’t…not eatnot pick up the flowersnot climb the treenot runnot parknot fishnot talknot smokeparkLet’s choose.1. We (mustn’t/ must) talk in the library.2. You (can/ mustn’t) cross the road with other people.3. I am looking for my cat. I (can/ can’t) find it.4. We (can/ must) swim well. Let’s watchLet’s read.Red man, stop. Green man, go!读对话，注意语音语调！Let’s read.What must you do on the road?I must look out for c...
