Lets study!What is it in English?It is a helmet.sledferryLets talk-What should we do when we meet the red light?-When the traffic light is red,we should stop and wait.Learn more wordsattention 注意must 必须traffic 交通fast 快的wear 戴知识串讲知识串讲一、词组：pay attention to 注意 traffic lights 交通信号灯 slow down 慢下来二、must是情态动词，后面接动词时，要用动词原形。例句：You must stop and wait.三、由how引导的特殊疑问句结构：How+助动词/情态动词+主语+?例句：How do you feel?How do you go to school?
