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课件网) Unit 3 Safety Grammar Building Your Vocabulary Fill in the blanks with the correct forms of the given words. Ⅰ training hang expect earthquake knife shoulder necessary heat salt Complete the passage with the correct words.The first letter is given. Ⅱ It is not safe when people are not c_____. S_____ accidents often happen and injure many people.A lot of people lose their lives. For example, many people drive after drinking. They don't care about the r_____．Society must work together to p_____drunk drivers f_____harming others and themselves. rom areful erious ules revent Grammar in Use A new library will soon open in your school. Help the librarian write a notice to the students. Notice to students 1．Show your library card to the librarian. 2．Don't talk in the reading room. 3．Never… . 4．Please… . 5._____ 6._____ 7._____ 8._____ 9._____ 10._____ A new library will soon open in your school. Help the librarian write a notice to the students. Notice to students 1．Show your library card to the librarian. 2．Don't talk in the reading room. 3．Never . 4．Please . 5._____ 6._____ 7._____ 8._____ 9._____ 10._____ eat in the reading room. be careful with books. Don't make or answer the phone. No smoking. Do not fight. Don't tear the books. Don't make noise. Please return books on time. [探究] 祈使句 的用法 用于表达命令、请求、劝告、警告、禁止等的句子叫作祈使句。 祈使句因对象(即主语)是第二人称,所以通常都省略。祈使句的动词都为一般现在时, 句末则使用句号或叹号, 读降调。 什么是祈使句？ 祈使句的肯定句式： Do型(即：行为动词＋宾语＋其他) eg： Stand up, please.请起立。 Let型(即：Let＋宾语＋动词原形＋其他) Let me help you.让我帮助你。 Let's go home. 让我们回家吧。 Be型(即：Be＋表语＋其他) Be quiet, please.请安静。 [拓展] “Let's＋动词原形” 结构, 表示提建议, 可与 “Shall we＋动词原形” 或 “Why not＋动词原形” 相互转换。 eg： Let's go on a picnic.让我们去野餐吧。 ＝Shall we go on a picnic？ ＝Why not go on a picnic？ 祈使句的否定句式： Don't＋动词原形 Don't open the window. 不要开窗户。 Never＋动词原形 Never give up! 千万不要放弃！ No＋名词/动名词＋其他 No smoking！禁止吸烟！ Let引导的祈使句的否定形式是： Let＋宾语＋not＋动词原形＋其他成分; 也可在let前加Don't. [注意] Let's 开头的祈使句，必须在Let's 后加not。 eg：Let him not play.＝Don't let him play.别让他玩。 Let’s not tell him about it.咱们别告诉他这件事。 祈使句的反意疑问句形式： 1. 一般由will you/won’t you构成反意疑问句。 eg： Don’t tell anyone about it, will you 不要告诉任何人这件事, 好吗 2. Let’s的反意疑问句用shall we; 而Let us/me的反意疑问句用will you或won’t you。 eg：Let’s go to the park tomorrow, shall we Let the two kids play the basketball, will you [拓展]祈使句常用的两个重要句型： 1. “祈使句+and+表好结果的陈述句”用来叙述肯定的条件。 eg： Hurry up and you will catch the train. 快点, 你就会赶上火车。 可以转换为含 “if ”引导的条件状语从句的复合句。 If you hurry up, you will catch the train. 2. “祈使句+or+表坏结果的陈述句 ... ...
