Unit2SectionAGrammarFocus(3a~3d)课件人教版英语七年级下册

Unit2NoRules,NoOrdersSectionAGrmmarFocus(3a~3d)Whatrulesdowefollow?ReviewWhatrulesshouldTomfollow?Tom_________eatsweetsintheclassroombecausetheydon’t___________inclass.Tom_________bringhismobilephonetoclass.Hehasto________hisphoneandkeepit___________.can’teatsnacksmustn’tturnoffinhislockerReviewWhatrulesshouldMarryfollow?Marry_________runinthehallway.Sheshould________inthehallway.can’twalkReviewWhatrulesshouldMarryfollow?Sally_________wearherownjacketatschool.Shehastowear____________.mustn’ttheschooluniformReviewWhatrulesshouldTonyfollow?Tony_______litter.Hemustkeeptheschool____________.can’tcleanandtidy3aReadthesentences.Dotheverbsinboldneedtochangeforms?Why?Walkinthehallway.Don'trun!

Bepoliteandtreatoneanotherwithrespect.Don'tlitter./Youmustn'tlitter./Youcan'tlitter.Canwebringourphonestoclass?No,wecan't.Wemustkeeptheminourlockers.Canweeatsnacksinclass？No,wecan'teatinclass.Wehavetoeatinthedininghall.3aReadthesentences.Dotheverbsinboldneedtochangeforms?Why?Youmustn'tlitter.Youcan'tlitter.Canwebringourphonestoclass?No,wecan't.Wemustkeeptheminourlockers.Canweeatsnacksinclass？No,wecan'teatinclass.Wehavetoeatinthedininghall.Thehighlightedwordsareall____________________.Theyshouldgowith_____________________________.modalverbs(情态动词)baseformsofverbs(动词原形)GrmmarFocusModalverbs(情态动词)定

义表示说话人的语气，情感和态度的词。用

法情态动词本身有________。没有________和________的变化。不能单独作________，需和__________一起构成谓语。常见情态动词can/can’t,must/mustn’t,could/couldn’tshould/shouldn’t,may词义人称数谓语动词原形GrmmarFocuscan/can’t的用法用

法

表示许可，意为“可以，能”eg.Wecaneatinthedininghall.Wecan’teatintheclassroom.

表示能力，意为“会，能”eg.Icanswim/speakEnglish.

Ican’tswim/speakEnglish.

表示请求，意为“可以，能”eg.Canyouhelpme?

Canyougivemesomeadvice?表许可：意为经过他人的同意，允许做某事。表请求：意为请求，要求他人做某事。GrmmarFocusmust/mustn’t的用法用

法

强调说话人的主观意愿eg.Wemustlistencarefullyinclass.

常用于一般现在时，无人称和数的变化eg.Imustworkhard.He/She

mustworkhard.

We/Theymustworkhard.

否定形式为mustn’t，表示“不准，禁止”eg.Wemustn’tlitter.Wemustn’tbringmobilephonestoclass.GrmmarFocusmust/mustn’t的用法Must引导的一般疑问句

Mustweweartheschooluniforms?Yes,wemust.肯定回答：常用_______回答。否定回答：常用_______或___________回答。mustneedn’tdon’thavetoNo,weneedn’t./No,wedon’thaveto.GrmmarFocushaveto的用法用

法

强调客观的需求eg.Wehavetokeepourphonesinthelockers.

有人称和数的变化eg.Ihavetowalkinthe

hallway.He/She

hastowalkinthe

hallway.

We/Theyhavetowalkinthe

hallway.

否定形式为don’t/doesn’thaveto，表示“不必”eg.Wedon’thavetoweartheschooluniforms.He/Shedoesn’thavetoturnoffhis/herphone.GrmmarFocus

辨析

must&haveto用法否定意义时态musthaveto侧重于主观必要和个人意志侧重于客观上的必要mustn’t表示禁止don’thaveto表示不必要没有人称，数和时态的变化有人称，数和时态的变化3bCompletethesentencesusing

can,haveto/must,orcan’t/mustn’t1.Don'tjumpthequeue.You______________waityourturn.2.I_____feedmydogmanykindsoffood,butI______givehimchocolate.Itisbadforhim!3.A:CanIleavetheclassroomifIdon'tfeelwell?B:Yes,butyou______tellyourteacheraboutitwhenyou_______beabsentfromclass.4.A:Hey!CanIlookatyourbook?B:Shh,we____________talkquietlyinthelibrary.5.A:Canyouputonyourseatbelt?We______wearonewhenwe'reinacar.B:Sure.Thanks!haveto/mustcancan’tmusthavetohaveto/mustmustmanykindsofallkindsofakindof.givesb.sth.givesth.tosb.bebadforbegoodforquietly=quiet+ly3aReadthesentences.Dotheverbsinboldneedtochangeforms?Why?Walkinthehallway.Don'trun!

Bepoliteandtreatoneanotherwithrespect.Don'tlitter.Allthesesentencesare____________________.imperatives(祈使句)Theyallstartwith__________________________.baseformsofverbs(动词原形)GrmmarFocus

祈

使

句含义

祈使句以__________开头，没有______和_____的变化。

用于表达____，______,_____,______和_____。

祈使句没有_______，实际上是省略了主语_____。动词原形人称

数命令

请求

建议

劝告

禁止

主语

youGrmmarFocus

Do型祈使句构

成

肯定句eg.Arriveontime.Keepourschoolcleanandtidy.Raiseyourhand.

否定句__________开头。动词原形在句首加______或______。don’tnevereg.Don’ttalkinclass.Don’teatintheclassroom.Nevergiveup.GrmmarFocus

Be型祈使句构

成

肯定句eg.Becareful.Bepolite.Beagoodstudent.

否定句Be+________或______。形容词

名词在句首加______或______。don’tnevereg.Don’tbelateforschool.Don’tbenoisy.GrmmarFocus

Let型祈使句构

成

肯定句eg.Let’sgo.Lethimkeepquioet.Letthemfollowrules.

否定句Let+_____+_________。宾语

动词原形Let+宾语+_____+动词原形。noteg.Lethimnotmakeanoise.Let’snottalkinclass.Letthemnotbreakrules.GrmmarFocus

No型祈使句

否定句No+______或_______。(表禁止)Ving名词eg.Noparking.Nosmoking.Nophotos.3cLookatthefirstsignandreadtherules.Thenwritetherulesfortheothersigns..Donoteatordrink.Noeatingordrinking.Youcan’tormustn’teatordrink.3cLookatthefirstsignandreadtherules.Thenwritetherulesfortheothersigns..Donotpark.Noparking.Youcan’tormustn’tparkyourcar.park:v.停车n公园

3cLookatthefirstsignandreadtherules.Thenwritetherulesfortheothersigns..Donottakephotos.Nophotos.Youcan’tormustn’ttakephotos.3cLookatthefirstsignandreadtherules.Thenwritetherulesfortheothersigns..Donotswim.Noswimming.Youcan’tormustn’tswimhere.3cLookatthefirstsignandreadtherules.Thenwritetherulesfortheothersigns..Donotfeedbirds.Nofeeding.Youcan’tormustn’tfeedbirds.3cIngroups,brainstormthreerulesforoneoftheplacesbelow..Shareyoursignsinclassandexplainwhattheymean.libraryschooldininghallparkcinemahospitalInthelibrary,wemustkeepquiet.Wemustn’tmakenoise.Wecan’t....3cIngroups,brainstormthreerulesforoneoftheplacesbelow..Shareyoursignsinclassandexplainwhattheymean.keepquietNonoiseNoeatingInthelibrary,wemustkeepquiet.Wemustn’tmakenoise.Wecan’teatanysnacks,butwecandrinkwater.library3cIngroups,brainstormthreerulesforoneoftheplacesbelow..Shareyoursignsinclassandexplainwhattheymean.Don’tlitterNonoiseNoswimmingInthepark,wecan’tlitter.Weshouldkeeptheparkcleanandtidy.Wemustbepolite,sowemustn’tmakenoiseinpublic.Wemustn’tswimintheriver,