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1、Unit 4,Dont eat in class.,Period 1,We have school rules(校规) and class rules(班规).,What are the rules?,规定是什么？,Can you eat in class?,No, we cant.,Dont eat in class.,eat in class,在班里吃东西,Dont listen to music in class.,Can we listen to music in class?,No, we cant.,在班里听音乐,listen to music in class,Can we ar
2、rive late for class？,Dont arrive late for class.,7:15,No, we cant.,arrive late for class,上课迟到,Dont run in the hallways.,run in the hallways,在走廊上跑,Can we run in the hallways？,No, we cant.,Dont fight .,Can you fight in school？,No, we cant.,fight,打架,fight with sb.同某人打架,Dont arrive late for class.Dont r
3、un in the hallways.Dont eat in the classroom.Dont listen to music in class.Dont fight.,What are the rules?,祈使句,表示请求,命令等语气的句子.有肯定和否定之分，肯定祈使句以动词原形开头，而否定祈使句只需在动词原形之前加dont.,肯定祈使句 否定祈使句Sit down.Come on.Eat at home.Listen to music.Do your homework.,Dont sit down.,Dont come on .,Dont eat at home.,Dont list
4、en to music.,Dont do your homework.,1,3,4,5,2,1a,Write the number of the rule next to the students.,School Rules Dont arrive late for class. You must be on time.Dont run in the hallways.Dont eat in the classroom. You must eat in the dining hall.Dont listen to music in class.Dont fight.,Listen. What
5、rules are these students breaking? Write the numbers below the names.,2,3,4,Thank you !,period two,情态动词must和have to,must,have to,必须 （强调主观） 后接动词原形, be动词原形,必须 ,不得不（强调客观,不情愿） 后接动词原形，be动词原形,eg. I must go now. You must be quiet.,eg. You have to go home. I have to do my homework.,情态动词,must用法举例,wear a unif
6、orm 穿校服,You must wear a uniform.,wear a hat 戴帽子,You must wear a hat.,eat in the dining hall在食堂吃饭,You must eat in the dinning hall.,be quiet 保持安静,We must be quiet.,7:15,be on time 准时,We must be on time.,have to用法举例,do my homework做我的作业,A；What do you have to do?（你不得不做什么）,B：I have to do my homework.,cle
7、an my room打扫我的房间,A；What do you have to do?（你们不得不做什么）,B：I have to clean my room.,be quiet 保持安静,A；What do you have to do? （你们不得不做什么）,B：We have to be quiet.,lay the guitar 弹吉他,A；What do you have to do? （你不得不做什么）,B：I have to play the guitar.,have to 用法注意 1,have to 后接动词原形eg: I have to do my homework. I h
8、ave to be quiet. 当主语是第三人称单数时，have to 变为 has toeg: She has to do her homework. He has to be quiet.,当have to 用于疑问句和否定句中时，要根据情况添加助动词。例1: I have to go now.(陈述句) 一般疑问句： 否定句： 例2：He has to run.(陈述句)一般疑问句：否定句：,have to 用法注意 2,Do you have to go now？,I dont have to go now.,Does he have to run？,He doesnt have t
9、o run.,1.Write your name on the list.（改为否定句） _ _your name on the list.2 Go to the bus stop.（改为否定句）_ _ to the bus stop.3 I have to do to school.(改为一般疑问句)_ _ _ to go to school?4. Mary has to do the cleaning at home on weekends, (改为一般疑问句) _ Mary _ to do the cleaning at home on weekends? 5. She has to go. （改为否定句） She _ _ to go.,Dont write,Does,have,Dont go,Do you have,doesnt have,Thank you!,