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1、,Imperative Sentence英语祈使句,河南省焦作市孟州市河雍小学 杨月仙,Dont play football on the street.,不要,Dont sleep in class.,不要,Please be quiet.,Please stand in line.,Dont _ Please_,talk in class.,listen to the teacher.,Look and think(What can you find?)Dont play football on the street.Dont sleep in class.Please be quiet.
2、Please listen to the teacher.Dont talk in class.Lets go tomorrow.,（表示命令）,（表示请求）,（表示警告）,（表示建议）,以上这些 以Please和Dont开头，来表达请求、命令、建议、警告的句子就叫祈使句，有时为了表达客气的语气，我们在句首或句尾加上please。,（表示请求）,（表示警告）,（一）祈使句的特征 1.以动词原形开头或Dont 开头，句末用句号或叹号；2.无主语（通常说话的对象是you,you 常被省略）；3.为了表达客气的语气，在句首或句尾加上please。eg.Be careful!Dont open the
3、 door.Please be quiet.=Be quiet,please.,语法探秘,（二）祈使句的表达方式,肯定结构,1.行为动词原形+宾语+其它成分,2.Be+表语(名词/形容词)+其它成分,Be a good student!做个好学生！,3.Let+宾语(通常为me/us)+动词原形+其它成分,4.Please+动词原形+其他(please也可放在句尾，其前加逗号),Lets go home!咱们回家吧！,Please sit down.=Sit down,please.请坐。,Open the door.Stand in line.,Let me help you.让她进来。,B
4、e quiet!安静！,否定结构,1.Dont+动词原形+其它成分,Dont turn right.不要右转。,2.No+名词或动词(是禁止或警示语),No photos!禁止拍照！,No parking!禁止停车,No smoking！禁止吸烟,Dont be late.不要迟到。,Dont walk on the grass,Dont go straight on,Dont swim here.,Dont ride your bike here.,Fill in the blanks with“Please”or“Dont”.1.listen to the teacher.2.sleep in class.3.be quiet.4.eat in class.5.run in the classroom.6.draw on the wall.,Please,Dont,Dont,Dont,Dont,Please,轻松小练习,祈使句，无主语，动词原形要牢记；表请求或命令，加上Please表客气；如果变成否定句，Dont开头别忘记；No加名词/动名词是警示；歧视用法记心里。,Do you remember?,Thank You For Listening!Bye Bye!,
