Unit 3 We should obey the rules.Lesson 17Let’s chant>>Warm-up>>Lead-inYou should…/You shouldn’t… Review>>Lead-inWhat do you think of them?Do they obey the rules?>>PresentationLook at the picture and discuss.>>PresentationJust talk>>Presentationmustmustn’tV.原形must not>>Presentationmustmustn’tshouldshouldn’t应该不应该必须禁止Just talkYou mustn’t ________ the street now.>>Practicecross>>PracticeJust talkYou mustn’t ________ on the ground.spitJust talk>>PracticeYou mustn’t ________ the flowers.You must ____________ the grass.keep offpickJust talk>>PracticeYou must _______________ young children.You mustn’t _________.littertake good care of>>PracticeLet’s act!You must keep off the grass.>>PracticeYou ________ cross the street now. You ________ wait for the green light.You ________ pick the flowers.You ________ spit on the ground.You ________ litter.You ________ keep off the grass.You ________ take good care of young children.mustmustn’tmustmustn’tmustn’tmustn’tmustn’tmustmust>>Summary如何表达必须和禁止做某事？You must/mustn’t…例如： You must keep off the grass. You mustn’t pick the flowers.1. 观看课文动画，按照正确的语音、语调朗读课文。 2 . 在公共场所必须做和禁止做哪些事情？请列出一个清单。 3 . 预习Lesson18。>>Homeworkclose
