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1、高一升高二讲义Lesson Four自测单词和短语（汉译英、英译汉）昂贵的导游；向导总的来说对.感兴趣博物馆自然的打羽毛球熬夜语言放风筝吃惊上上下下；起伏把.弄醒逃跑；跑开搭起；举起ForestShout toIn the coun trysideFire statio n play the pia nobring good luck to be popular with.around the world be differe nt from in the end would likespecialdescribecriminal (be) of medium height语法祈使句1. 祈使
2、句的概念祈使句是一种表达感情色彩如劝告、叮嘱、请求或命令等的句子。因此，祈使句的 主语是you，但要省略。在表达请求或劝告时，在祈使句前或句末可加上please，以使句子的语气更加缓和或客气。例如：停！ 请帮帮我！ 2. 肯定祈使句1) Do型，do指代一切动词的原形如：过得愉快！停止！听妈妈的话！2) Be 型，以 Be 开头如：保持安静！小心！3) Let型，固定句型：Let sb. do sth.让某人做某事如：让我帮助你！让他去吧！3. 否定祈使句1) Do型，在句首直接加Dont.女口： Speak!Run! 2) Be 型，在句首直接加 Dont.女口： Be lazy!3 ) L
3、et型，有两种结构： Donlet sb. do sth.Let sb. not do sth.如： Let him call me. /4 ) No型，有两种结构：No+名词 No+动词ing如：不要拍照！/ 不要吸烟！/ 练习1：将以下祈使句改为否定式：1. Come here early. 2. Ask him. 3. Please wait for her. 4. Read the book carefully. 5. Sit under the tree, please. 6. Lets go there together. 练习 2：用括号内所给动词的适当形式填空。1. Its a
4、n important meeting. (not, be )late.2. (not , m a ke) any noise! Your mother is sleeping.3. (not, speak) with your mouth full of food and (be) polite.4. ( not, talk) and (read) aloud.5. (not,leave) your homework for tomorrow, Larry.6. (look) out! A car is coming.7. (give) us ten years and just see w
5、hat our country will be like.8. (not, let) the baby cry.9. Wear more clothes or you (catch) a cold.10. Lets (not, say) anything about it.练习3：把下列句子变成祈使句。1. You must arrive on time. 2. You can help your sister. 3. You have to keep quiet. 4. You cant stop him. 5. You mustnt eat in class. 三、 经典段落背诵Dear
6、Jane,Hows your summer vacation going? Are you studying hard, or are you having fun? Im having a great time in Europe! My family and I are on a vacation in the mountains. I want to call you but my phone isnt working, so Im writing to you.Dave四、 作业1. 及时复习今天的知识，并用肯定祈使句写五个句子，并把它们改为否定祈使句。2. 熟练背诵小段落。3. 背诵初二上册第四单元的单词,并制作生词表。Welcome ToDownload !欢迎您的下载，资料仅供参考!
肯定祈使句和否定祈使句讲解与练习
