肯定祈使句和否定祈使句讲解与练习.doc

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1、高一升高二讲义LessonFour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_______________

2、__逃跑；跑开______________搭起；举起___________________Forest________________Shoutto_______________Inthecountryside_____________Firestation__________________playthepiano____________________bringgoodluckto…___________________bepopularwith…____________aroundtheworld______________bedifferentfrom…___________

3、___intheend__________________wouldlike___________________special__________________describe________________criminal_________________(be)ofmediumheight__________________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！_____________

4、___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！_______________________33）Let型，固定句型：Letsb.dosth.让某人做某事如：让我帮助你！______________________________让他

5、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：Belazy!___________________________3）Let型，有两种结构：①Don’tletsb.dosth.②Letsb.notdosth.如：Lethimcallme.______________________________/______________________

6、_______4）No型，有两种结构：①No+名词②No+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.Comehereearly.2.Askhim.3.Pleasewaitforher.4.Readthebookcarefully.5.Situnderthetree,please.6.Let’sgotheretogether.练习2：用括号内所给动词的适当形式

7、填空。1.It’sanimportantmeeting.__________(not,be)late.2.____________(not,make)anynoise!Yourmotherissleeping.3.____________(not,speak)withyourmouthfulloffoodand________(be)polite.34.____________(not,talk)and____________(read)aloud.5._