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1、-unit4 Don27t eat in class 初中英语祈使句-第 3 页初中英语祈使句 祈使句常常是表达说话人对对方的劝告、叮嘱、请求或命令等。因此，祈使句中一般没有主语，但根据其句意，实际上是省略了主语you。祈使句句末用感叹号或句号，朗读时，常用降调。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。1. 肯定的祈使句（1）Do型祈使句：实义动词原形+其他 Stand up, please. = Please stand up. 请起立。请打扫教室._（2）Be型祈使句：Be + adj. Be careful! = Look out! = Ta
2、ke care! 小心 / 当心！请安静._（3）Lets + 动词原形 Lets go to school together. 咱们一起上学去吧。咱们一起打篮球吧._ (4) No 型祈使句：No+v-ing/名词（表禁止） eg: No smoking ! No photos! 禁止说话！_ 禁止停车！_2. 否定的祈使句(1) Dont + 动词原形 Dont stand up. 别站起来。Dont be careless. 别粗心。Dont let them play with fire. 别让他们玩火。 请不要在教室里打篮球!_（2）Lets ( let sb ) + not + 动
3、词原形 Lets not say anything about it. 对于这件事，咱们什么也别说。 Let them not play with fire. 别让他们玩火。 别让他们打架._ must “必须”（强调主观意志）；没有人称和数的变化；否定：mustnt “不准” 你必须今天完成家庭作业._. 你禁止在课堂上说话._ Must I clean the classroom? No,_/_have to “必须”（强调客观因素）三人称用：has to; 否定：dont/ doesnt have to他得走了。_ 我们没必要周末上课._语法练兵场1. _listen to music
4、in the classroom. A. Not B. No C. Dont 2. _ late again, Bill! A. Dont to be B. Dont be C. Not be D. Be not3. _ cross the road until the traffic lights turn green. A. Not B. Wont C. Doesnt D. Dont4. Kate, _ your homework here tomorrow. A. bring B. brings C. to bring D. bringing5. _ me the truth, or I
5、ll be angry. A. Telling B. To tell C. Told D. Tell6. She has to _her homework every night. A. does B do C. doing 7. Sorry, you _play basketball in the classroom. A cant B must C dont 8. Lets _ on time for classes. A be B be not C are句型转换1. The teachers often tell the students not to be careless.（改为祈
6、使句）_ _careless, please.2. Please sit next to Nancy. （改为否定句）_ _ next to Nancy.3.Jack has to play the piano every weekend.(改为一般疑问句) _4.Be quick!( 改为否定句)_5. You cant eat food in class.(改为祈使句)_6.You must walk to school today. (改为祈使句)_7.You cant be late for class next time. (改为祈使句)_Unit4. Dont eat in cla
7、ss第一课时 Section A 1a1c1. 掌握本课单词: rule, arrive, hallway, hall, listen, fight, sorry, 2. 重点短语：dining hall, arrive late for school, (be) on time, listen to music3. 重点句型：能正确使用否定祈使句陈述规章要求，对别人的劝告，警告作出礼貌回应 Dont run in the hallways. / Dont fight. Sorry, Ms Clark; 请写出下列短语。1.在课堂上_ 2.校规_ 3.做某事迟到_ 4.准时_ 5.在走廊里_
8、6.在教室里_ 7.在餐厅里_ 8.听_四. 知识点拨1. arrive late for school/ be late for school/ come to school late 上学迟到2. arrive in/ at + 地点 3. in class 在课堂上 get to + 地点 in the class 在班里 reach + 地点 in the classroom 在教室里 3. wear “穿着，戴着”（强调状态） 6. listen to “强调听的动作” put on “穿上”（强调瞬间动作） hear “强调听的结果，听见” be in + 颜色 sound “听起
9、来”系动词后接形容词课堂达标：请写出下列6个句子。1.不要在课堂上吃东西。_2.不准上课迟到。你必须准时。_3.不准在走廊里跑。_4.不准在教室里吃东西。你必须在餐厅吃饭。_5.不准在课堂上听音乐。_6.不准打架。_1. Dont arrive late _school. A. at B .in C. for2. I cant go to the party. I _ do my homework. A must B can C has to 3. - Dont eat in the classroom , Alex. - _, Mr Yang A. Excuse me B. Thanks C. Sorry4. I usually _ the bus stop at 7:30 in the morning. A arrive B arrive at B arrive in 用can ; cant ; must; have to ; 填空1. Alice _ do her homework, so she goes to ask her teacher for help.2. You dont _clean your room today.3. _Jim speak English?4. -_I help her with Chinese? -Yes , you must.