人教版 一年级起点 四年级上 Unit 4 Asking for help Lesson 1 lead in Who are they? Where are they? Presentation climb on the window ledge [?w?nd??] [led?] 爬窗台 ow字母组合? [a?] flower down now [??] know low Presentation dangerous adj 危险的 [?de?nd??r?s] It’s dangerous. 危险。 danger n 危险 be in danger 处于危险之中 It’s _____ to play football in the street. Presentation play with fire It’s dangerous to _____. Presentation Be careful. 当心。 [?ke?f?l] care n 照顾照看 take care of 照顾照看 --ful 后缀，构成形容词 colorful beautiful useful _____! It’s dangerous. Presentation run down the stairs [st??] 跑下楼梯 run up the stairs 跑上楼梯 We shouldn’t _____. Presentation Be careful! Don’t _____. It’s dangerous. run down the stairs Presentation Be careful! Don’t _____. It’s dangerous. swim in the river Be careful! Don’t _____. It’s dangerous. play with fire Presentation Be careful! Don’t _____. It’s dangerous. climb on the window ledge Presentation 祈使句 祈使句是用来表达命令、请求、劝告、警告、禁止等的句子。 特点： 1）通常省略Do型祈使句的主语，若想指明服从这项命令的人，我 们可以在祈使句的前面或后面加上姓名和称呼； 2）Do型祈使句里的位于动词一般用原型； Presentation 3）please可以用于Do型祈使句的开头或末尾，使语气更委婉。在 Do型否定祈使句重，please位于don’t 的前面或句末； Please sit down. Please don’t jump in the room.= Don’t jump in the room, please. Presentation 类型： 1）Do型祈使句。句型结构：实义动词原形（+其他） Come in, please! 2）Be型祈使句。句型结构：Be +表语（+其他） Be quiet, please. 3）Let 型祈使句。句型结构：Let +宾语+动词原形（+其他） Let Bob go shopping! Presentation 4）No 开头的祈使句。句型结构： No+动词-ing形式/ 名词. No fishing. = Don’t fish. No parking. = Don’t park. No photos. 注意： No+动词-ing= Don’t +动词原形 Presentation Practice Be careful! Don’t _____. It’s dangerous. Fill in the blanks. Practice Let’s write. Be careful! Don’t . Don’t climb on the ledge. It’s dangerous! 看图写短语 _____ _____ _____ Consolidation 选择填空 1）_____ careful! Don’t stand on the desk. A. Be B. Is C. Are 2）Don’t play with the knife. It’s _____. A. fun B. interesting C. dangerous 3）Don’t sit _____ the window ledge. A. in B. on C. at Consolidation A C B 谢谢 21世纪教育网（www.21cnjy.com) 中小学教育资源网站 有大把高质量资料？一线教师？一线教研员？ 欢迎加入21世纪教育网教师合作团队！！月薪过万不是梦！！ 详情请看： https://www.21cnjy.com/help/help_extract.php
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