公开课人教七年级下册unit祈使句.pptx
Whatcanwedoatschoolorintheclassroom?Whatcantwedo?Howtobeagoodstudent?第1页/共22页Dont eat in class.Dont arrive late for classDont sleep in class.Dont draw on the wall.Dont talk.Dont play sports in the classroom.Dont fight.Dont listen to music in class.school rules第2页/共22页祈使句是表示请求、命令、建议或劝告等的句子。一一.祈使句的概念祈使句的概念Imperative Sentence第3页/共22页二二.祈使句的特点祈使句的特点We clean the classroom every day.He usually goes to the library on weekends.2.谓语动词一律用原形。谓语动词一律用原形。1.主语通常为you,但常省略。3.句末根据语气的强弱用感叹号或句号。Dont arrive late for class.Sit down,please!第4页/共22页Ms.ChensaysCleantheblackboard.Standup!Sitdown,please!Pleaseopenthedoor.TurntoPage21.Listentomecarefully.Game:I say,you do第5页/共22页Read and observe(观察)Cleantheblackboard.Standup!Listentomecarefully.TurntoPage21.Sitdown,please!Pleaseopenthedoor.Dont be late for class.Dont eat in the classroom.Dont run in the hallways.Dont fight.Dont sleep in class.Dont wear a hat in class.第6页/共22页Draw the conclusion(得出结论)祈使句的结构如下：祈使句的结构如下：(Please)+Dosth.(Please)+Dontdosth.肯定：肯定：否定否定：第7页/共22页注意：注意：有时可在祈使句的句首或句尾加上有时可在祈使句的句首或句尾加上please，使语气显得客气、有礼貌。，使语气显得客气、有礼貌。如如果在句尾加果在句尾加please，应该用逗号与前句，应该用逗号与前句隔开。隔开。e.g.Gothisway,please.请这边走。请这边走。Pleasegothisway.第8页/共22页三三.祈使句的形式祈使句的形式1.祈使句的肯定式(1).以行为动词原形开头，简称Do型。e.g.Comehere.(2).以动词be开头，简称Be型。e.g.Bequiet,please.Bekindtoyourclassmates.(3).以Let开头，简称Let型。e.g.Letsgo!Letsplaybasketballafterschool.“三姐妹”第9页/共22页Turn right!Turn left!Be quiet.Go upstairs！Go downstairs!signs第10页/共22页2.祈使句的否定式祈使句的否定式(1).Do型和Be型的否定式是在句首加dont。e.g.Dontsithere.不要坐在这儿。不要坐在这儿。Dontbelate.别迟到。别迟到。(2).以以let开头的祈使句开头的祈使句，其否定式有两种：，其否定式有两种：一种是一种是直接在句首加直接在句首加dont，另一种是另一种是“let+宾语宾语+not+动词原形动词原形+(其他其他)”。e.g.Dontlethimgo.不要让他走。不要让他走。Letsnotgothere.咱们别去那儿。咱们别去那儿。“三兄弟”第11页/共22页注意：注意：(3)“No+名词名词/动词动词-ing形式形式”表示禁止表示禁止或规劝，常用于公共场所或规劝，常用于公共场所。e.g.Nophotos!禁止拍照！禁止拍照！Noswimming！禁止游泳！禁止游泳！第12页/共22页Guessing GameDont park your car.Dont smoke!No parking!No smoking!第13页/共22页Guessing GameDont take photos!Dont swim here!No photos!No swimming!第14页/共22页LibraryRules1.Donttalk.2._3._4._Writetherulesfortheschoollibrary.Dontlistentomusic.Donteatordrink.Donttakephotos.方法指导：1.由图示可知都是一些禁止类的祈使句。2.可知应用祈使句的否定形式。Task1:第15页/共22页Ifyouaretheheadteacher(班主任),discussandmakerulesforourclass.Seewhichgroupcansaythemostclassrules.RulesofClass111._2._3._4._5._.Task 2第16页/共22页RulesofCass111._2._3._4._5._.Dontbelateforclass.Donteatordrinkintheclassroom.Dontruninthehallways.Wearschooluniformsonschooldays.Cleantheclassroomeveryday.第17页/共22页祈使句的用法祈使句的用法主语是主语是you常省去，动词原形开头记。常省去，动词原形开头记。否定形式要注意，句首要把否定形式要注意，句首要把dont加。加。要讲客气用要讲客气用please，句首、句末没关系。句首、句末没关系。SummaryBe a good student.第18页/共22页祈使句句式祈使句句式肯定形式肯定形式否定形式否定形式Do型型：动词原：动词原形形+其他其他Openthedoor.Dontopenthedoor.Let型型：let+宾宾语语+动词原形动词原形+其他其他Letsgothere.1.Dontletsgothere.2.Letsnotgothere.Be型型：Be+表语表语 Bequiet！Dontbelateforclass.No型：型：No+名名词词动名词动名词Nophotos!Nosmoking!第19页/共22页HomeworkTrytowritedownatleastfivesentencesaboutyourfamilyrules.第20页/共22页1.Dont waste(浪费)water.7.Dont read in bed.2.Make the bed every day.3.Wash your hands before meals.4.Turn off the lights before you leave the room.5.Dont read or eat at the same time.6.Dont talk loudly on the phone.第21页/共22页感谢您的观看。第22页/共22页
