be動詞-情態(tài)動詞及助動詞用法

1、七年級英語雙休日作業(yè)班級：姓名：等級英語句型變化總結(jié)練習(xí)1、含有be動詞am,is,are構(gòu)成的句子：變一般疑問句時把a(bǔ)m,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：astudent?否定句:Heastudent.肯定句：WearefromChina.一般疑問句：fromChina?否定句：WefromChina2 .由情態(tài)動詞can,may,should等構(gòu)成的句子：變一般疑問句時把can,may,提到句子的前面，句尾用問號即可.變否定句時直接在can,may,后面加not即可.例如：肯

2、定句：Shecanswim.一般疑問句：sheswim?否定句:Sheswim.3 .由行為動詞構(gòu)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.變否定句時在主語后面加don't/doesn't,謂語用動詞原形。例如：肯定句:Theyplayfootballafterschool.一般疑問句:playfootballafterschool?否定句:Theyfootballafterschool.肯定何：TomwatchesTVeveryday.一般疑問句:TomTVeveryday?否定旬：TomTVeveryday.注意：變否定句時相關(guān)詞的改變

3、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，and改為or等：Therearesomebirdsinthetree.樹上有些鳥。Therearen'tbirdsinthetree.樹上沒有鳥。Helikesthebook,too.他也喜歡這本書。Hedoesn'tlikethebook,.他也不喜歡這本書。Helikessinginganddancing.他喜歡唱歌和跳舞。Hedoesn'tlikesingingdancing.他不喜歡唱歌也不喜歡跳舞。補(bǔ)充練習(xí)：根據(jù)句后括號內(nèi)的要求，填入

4、句中所缺的詞：1. Iknowtheanswer.（一般疑問句）knowtheanswer?2. Wecanseesomebirds.（一般疑問句）seebirds?3. Thereisacomputerinthehouse.（一般疑問句）acomputerinthehouse?4. Therearesomeflowersontheteachersdesk.（一般疑問句）anyflowersontheteachersdesk?5. Therearesomeapplesonthetree.（否定式）Thereapplesonthetree.6. Ithinkheisold.（否定句）Ithink

5、heold.7. Openthewindow.（否定句）openthewindow.8. WecanspeakgoodEnglish.（變否定句）WespeakgoodEnglish.9. Thankyouforhelpingme.（同義句）Thankyoufor.10. Whoseisthisbook?（同義句）isthis?11. Thisisherbook.（同義句）Thisbook.12. Hersweaterisred.（對劃線部分提問）ishersweater?13. Mypencilsareinthepencil-box.（對劃線部分提問）yourpencils?14. Igetupatsixeveryday.（對劃線部分提問）doyougetupeveryday?15. Therearefiftystudentsinmyclass.（對劃線部分提問）studentsarethereinyourclass?16. Thesearecars.（用buses改寫成選擇疑問句）Arethesecars?17. Thebookisinmyschoolbag.（變疑問句）thebookinyourschool-bag?18. Twoboysareinourhouse.（改為therebe句型