be動詞,情態(tài)動詞,助動詞do

1、be動詞，情態(tài)動詞，助動詞do/does的用法區(qū)別及練習1 .由連系am,is,are構成的句子：變一般疑問何時把am,is,are提到句子的前面，句尾用問號即可。變否定句時直接在am，is，are后面加not即可。例如：肯定句:Heisastudent.一般疑問句:Isheastudent否定句:Heisnotastudent.畫線提問:對he提問:Whoisastudent對astudent提問:WhatisheorWhatdoeshedo2 .由情態(tài)動詞can,may,should等構成的句子：變一般疑問何時把can,may提到句子的前面句尾用問號即可.變否定何時直接在can,may,后

2、面加not即可.例如:肯定句:Shecanswim.一般疑問句:Cansheswim否定句:Shecannotswim.畫線提問：又tshe提問:Whocanswim對swim提問:Whatcanshedo3 .由行為動詞構成的句子:需要加助詞do或does.變一般疑問句時把do/does放在句子前面.變否定何時把don't/doesn放在動詞的前面。要注意觀察動詞的形式并對號入座。一般疑問句和否定句的動詞三單式都要變回原型。playdoplaysdoes例如:肯定句:Theyplayfootballafterschool.Heplaysfootballafterschool.一般疑問

3、句:DotheyplayfootballafterschoolDoesheplayfootballafterschool否定句:Theydon't（donot）playfootballafterschool.Hedoesnptlayfootballafterschool.畫線提問:對they/he提問:Whoplaysfootballafterschool對playfootball提問:WhatdotheydoafterschoolWhatdoeshedoafterschool對afterschool提問:WhendotheyplayfootballWhendoesheplayfoot

4、ball針對性練習按要求改寫句子：knowtheanswer.（般疑問句）theanswercanseesomebirds."般疑問句）seebirdsdesignsclothes.L股疑問旬）heclothesaresomeflowersontheteachers一般疑問句desk.（）flowersontheteachersdeskaresomeapplesonthetree份定旬）Thereapplesonthetree.thinkheisveryold.（否定句）Ithinkheveryold.colouritgreen.（否定句）colouritgreen.doctorsa

5、rehelpful.（變否定句）mayhavesomehotdogs.般疑問句）aren'tanypearsinthebe®儀句）Therearepearsinthebox.signmeans“Nosmoking”Whatthissignlooksyoung.（改一般疑問句）sheyoungisyoung.（改為一般疑問句）pencilsareinthepencil-box.對戈U線音B分提問）yourpencilsgetupatsixeveryday.«寸戈U線部分提問）yougetupeverydayliketowalkhome.（改為一般疑問句）theyare

6、cars.州buses改寫成選擇疑問句）Arethesecarsplantisonemonth01d.（就劃線部分提問）plantboysareinourhouse.帔為therebe句型）twoboysinourhouse.planthastwogreenleaves.plantLigoestoHongKongbyplane.（同義句）MissLiHongKong.22.Thewomenworkintheshoefactory.（就戈U線部分提問）womenishappy,becauseheisgoingtotakeatriptomorrow.（就劃線部分提問）fathercancookth

7、emeals.（就劃線部分提問）father25.Youshouldaddwateroften.（一般疑問句）wateroften、變否定句時相關詞的改變肯定句變否定句時，除將謂語變?yōu)榉穸ㄊ酵?，句中其他詞語也可能隨之改變，如將some改為any，too和also改為either，already改為yet，and改為or等：Therearesomebirdsinthetree.樹上有些鳥。fTherearen'tanybirdsinthee.樹上沒有鳥。Helikesthegirl,too.他也喜歡這個女孩。fHedoesn'tlikethegirl,either他也不喜歡這個女

8、孩。Wehavealreadyseenthefilm.我們已看過這部電影。fWehavenotseenthefilmyet.我們沒有看這部電影。Helikessinginganddancing.他喜歡唱歌和跳舞。fHedoesn'tlikesingingrdancing.他不喜歡唱歌也不喜歡跳舞。二、部分否定與完全否定比較以下句子：Allofuslaughedwhenweheardit.聽到這事時我們都笑了。（肯定句）Allofusdidn'tlaughedwhenweheaM到.這事時我們并未都笑。（部分否定）Notallofuslaughedwhenweheardit.聽到這事時我們并未都笑。（部分否定）Noneofuslaughedwhenweheard