Don't eat in class. (2).ppt

SectionA12d-3cEnjoythesongsCanwe…?Why?1.WhatareJohnandAlicetalkingabout?_____________2.HowmanyrulesdoesAlicemention?______________3.IsJohnnewatschool?___________4.Aretheremanyrulesatschool?______________5.Canhebringmusicplayerstoschool?_______________6.Dotheyhavetoalwaysweartheschooluniform?_______________NoteObserveandLearn祈使句一般用来表示请求、命令、劝说、号召、警告等。在祈使句中,通常省略第二人称主语you。肯定式以动词原形开头，否定式一般在动词原形前加don’t。一、祈使句的肯定式1.以行为动词原形开头，简称Do型。e.g.Comehere.到这儿来。2.以动词be开头，简称Be型。e.g.Bequiet,please.请安静。3.以Let开头，简称Let型。e.g.Let’sgo!咱们走吧!二、祈使句的否定式1.Do型和Be型的否定式是在句首加don’t。e.g.Don’tsithere.不要坐在这儿。Don’tbelate.别迟到。2.以let开头的祈使句，其否定式有两种：一种是直接在句首加don’t，另一种是“let+宾语+not+动词原形+(其他)”。e.g.Don’tlethimgo.不要让他走。Let’snotgothere.咱们别去那儿。注意：“No+名词/动词⁃ing形式”表示禁止或规劝，常用于公共场所。e.g.Nophotos!禁止拍照！Nosmoking！禁止吸烟！【运用】将下列句子翻译成英语。1.请看这幅图画。2.不要在教室里跑。3.让我们帮助他。LibraryRulesDon’ttalk.________________________________________________haveto表示必须,强调客观需要,有不得不、被逼无奈做某事的意思。此词既有人称、单复数的变化,也有动词时态的变化。其否定形式和疑问句形式均需要借助助动词do才可以进行变化。haveto的句型结构:肯定句：主语＋have/has/hadto＋V原形＋其他.否定句：主语+don’t/doesn’t/didn’thaveto＋V原形＋其他.疑问句:Do/Does/Did＋主语＋haveto＋V原形＋其他?Bequiet?(she/haveto/inthelibrary)Q:Doesshehavetobequietinthelibrary?A:Yes,shedoes.2.Eat?(he/haveto/inthedininghall)Q:________________________________?A:_____________3.Listentomusic?(we/can/inthehallways)Q:________________________________?A:_____________4.Wearahat?(we/can/intheclassroom)Q:_____________________________?A:____________Atmydreamschool,wedon’thavetocometoschooleveryday…Wemustbequietinthecomputerroom.Don’truninthehallways.Wemustbeontimeforclass.-Canweeatintheclassroom?No,wecan’t,butwecaneatinthedininghall.-Doeshehavetowearauniformatschool?Yes,hedoes./No,hedoesn’t.-Whatdoyouhavetodo?Wehavetobequietinthelibrary.1.RememberthesentencesintheGrammarFocus.2.Writefiverulesinyourfamily.3.Previewthenewwordsandexpressions.