1、L e s s o n 1 7 we should obey the rules. You should/You shouldnt Review What do you think of them? Do they obey the rules? Look at the picture and discuss. Just talk must mustnt V.原形 must not mustmustnt shouldshouldnt 应该不应该 必须禁止 Just talk You mustnt _ the street now. cross Just talk You mustnt _ on
2、 the ground. spit Just talk You mustnt _ the flowers. You must _ the grass. keep off pick Just talk You must _ young children. You mustnt _. litter take good care of Lets act! You must keep off the grass. Practice You _ 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. mustmustnt mustmustnt mustnt mustnt mustnt must must 如何表达必须和禁止做某事？ You must/mustnt 例如： You must keep off the grass. You mustnt pick the flowers. Thank you.
