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1、高一升高二讲义Less on Four自测单词和短语（汉译英、英译汉）昂贵的Forest导游；向导Shout to总的来说In the coun tryside对感兴趣Fire stati on博物馆play the pia no自然的bring good luck to 打羽毛球be popular with 熬夜around the world语言be different from 放风筝in the end吃惊would like上上下下：起伏special把.弄醒describe逃跑；跑开crim inal搭起：举起(be) of medium height二、语法一一祈使句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 Don t.如： Speak! Run! 2) Be 型，在句首直接加 Don t.
3、女口： Be lazy!3) Let 型，有两种结构： Don let 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 un der the tree, please. 6. Let s go there together. 练习2 :用括号内
4、所给动词的适当形式填空。1. Its an importa nt meeti ng.(not, be )late.2. (no t,make) any no ise! Your mother is sleep ing.3. (not, speak) with your mouth full of food and(be) polite.4. ( not, talk) and(read) aloud.5. (no t,leave) your homework for tomorrow, Larry.6. (look) out! A car is coming.7. (give) us ten y
5、ears and just see what our country will be like.8. (not, let) the baby cry.9. Wear more clothes or you (catch) a cold.10. Let s (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 can t stop him. 5. You mustn teat in
6、 class. 经典段落背诵Dear Jane,How s your summer vacation going? Are you studying hard, or are you having fun? Imhaving a great time in Europe! My family and I are on a vacation in the mountains. I want to call you but my phone isn t working, so I m 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
