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1、人教新版人教新版五年五年级级下册下册Unit 3 We should obey the rules.Lesson 18Lead-inLets act!You must .You mustnt .PresentationmustmustntV.原形原形must notJust talkYou mustnt _ the street now.PracticecrossYou must _ for the green light.waitPracticeJust talkYou mustnt _ on the ground.spitJust talkPracticeYou mustnt _ the
2、flowers.You must _ the grass.keep offpickJust talkPracticeYou must _ young children.You mustnt _.littertake good care ofPresentationPresentationPresentationJust practicePracticeYou must/mustntPracticeLets act!You mustnt litter.PracticeJust writeCan you write them?waittakeyoungchildchildrenpeoplePracticeLets make and talkPresentationLets chantSummary四会单词：四会单词：wait如何表达必须和禁止做某事？如何表达必须和禁止做某事？You must/mustnt例如：例如：You must keep off the grass.You mustnt pick the flowers.takeyoungchild childrenpeoplePresentationThank you !
