肯定祈使句和否定祈使句讲解与练习(4页).doc

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1、-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 _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 _Forest_Shout to_In the countryside _Fire station _play the piano _bring good luck to _be popular with _around the world _be different from _in the end _would

2、 like _special _describe _criminal _(be) of medium height _二、 语法祈使句1. 祈使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、！_3. 否定祈使句1） Do型，在句首直接加Dont.如：Speak! _ Run! _2）Be型，在句首直接加Dont.如：Be lazy! _3） Let型，有两种结构： Dont 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.

4、 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 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

5、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. 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 h

6、elp 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 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。-第 5 页