肯定祈使句和否定祈使句讲解与练习

高一升高二讲义lesson four一、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 countryside 对.感兴趣 fire station 博物馆 play the piano 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 criminal 搭起；举起 (be) of medium height 二、语法祈使句1. 祈使句的概念精品资料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.如： be lazy! 3） let 型，有两种结构：don t 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 under the tree, please.6. let s go there together.练习 2：用括号内所给动词的适当形式填空。1. it s an important meeting. (not, be )late.2. (not,make) 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 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 t eat in class. 三、经典段落背诵dear jane,how s 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. iwant to call you but my phone isnt working, so i m writing to you.dave四、作业1. 及时复习今天的知识，