新版人教版七年级下册英语课件Unit 2第3课时（Section A Grammar Focus 3a-3d）.pptxVIP

;;Canwe______(bring)ourphonestoclass?;Canwe______(eat)snacksinclass?;Readthesentences.Dotheverbsinboldneedtochangeforms?Why?;1.祈使句的概念;Readandjudge(读句子，并判断).;Walkinthehallways.;

Do

型;

Be

型;

Let

型;

其他;为表示礼貌，可在祈使句的句首或句末加上please。当please在句末时，要用逗号与句子其他部分隔开。

请遵守校规。;;情态动词can;表示主观的义务或必要，无人称、数和时态的变化，意为“必须”。

我必须做作业。;表示肯定推测，常用于肯定句中，意为“一定、必然”。

这个故事一定很有趣。;情态动词haveto;haveto有人称、数和时态的变化，其

第三人称单数形式为hasto。

辛迪每天必须铺床。;含有haveto或hasto的句子需分别借助助动词do或does构成疑问句或否定句。

她必须早起吗？

你不必8点钟到那儿。;;Don’tjumpthequeue.You____________

waityourturn.;I____feedmydogmanykindsoffood,butI____________givehimchocolate.Itisbadforhim!;A:CanIleavetheclassroomifIdon’tfeelwell?

B:Yes,butyou_____tellyourteacheraboutitwhenyou________beabsentfromclass.;A:Hey!CanIlookatyourbook?

B:Shh,we___________talkquietlyinthe

library.;A:Canyouputonyourseatbelt?We_____________wearonewhenwe’reinacar.

B:Sure.Thanks!;Lookatthefirstsignandreadtherules.Thenwritetherulesfortheothersigns.;Readandwrite;Donotfeedanimals.

Nofeeding.

Youcan’t/mustn’tfeedanimals.;Ingroups,brainstormthreerulesforoneoftheplacesbelow.Thendrawsignstoshowtherules.Shareyoursignsinclassandexplainwhattheymean.;Inthelibrary

Wemustkeepquiet.

Wemustn’tmakenoise.

Wecan’teatordrinkhere.

Wecan’ttakebooksoutofthelibrarywithoutpermission.;Intheschooldinninghall

Wecan’tjumpthequeue.

Wecan’twastefood.

Wehavetocleanthetablebeforeweleave.;Inthepark

Wecan’tthrowrubbishhereandthere.

Wecan’twalkonthegrassandpickflowers.

Wecan’tplaywithfire.;Inthecinema

Wemustsitontheassignedseatshownontheticket.

Wemustn’tsmokehere.

Wemustkeepquietwhilewatching.;Inthehospital

Wemustn’tsmoke.

Wehavetobequiet.

Don’truninthehallways.;Rulesareeverywhereinourdailylife.Weshouldfollowtherulesandmakeaqu