Unit 3 We should obey the rules. Lesson 17 课件（27张PPT）

课件27张PPT。Unit 3 We should obey the rules.Lesson 17Ask and answer questions actively.Don’t make noise.Don’t eat in class.You should do housework.You should keep your room clean.You shouldn’t go home late.You shouldn't read in bed. What must you do？
必须
What mustn’t you do?
禁止
the green light
wait for the green light cross（穿过）the street
spit on the groundlitterkeep off the grasspick the flowerstake good care of young childrenNo spitting.You mustn’t spit.No riding.You mustn’t ride a bike.No swimming.You mustn’t swim.Be quiet.You mustn’t make noise.No littering.You mustn’t litter.No smoking .You mustn’t smoke.The Palace Museum
Please make rules in the park or museum with the sentences
“You must…”and “You mustn’t...”.Thank you .