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注意: should 和 shouldn?t 后跟動詞原形 What does this _____mean? It______ ? Danger? ! ______ I go there? No, you can?t. You _________go there. sign means Can shouldn?t Can I _______a hamburger here? No, you can?t. See? What ______ this sign _____? It means we_________ _____ _____ _____ _____. have does mean shouldn?t eat or drink here Unit 1Unit 2 練習(xí)題 1.—What does this sign ? ( ) It you shouldn’t walk on the grass. A. mean mean B. means means C. mean means 2. LiuTao should his homework now. ( ) A. do