肯定句变否定句讲课讲稿.doc

精品文档肯定句变否定句习题训练知识点总结：把肯定句改成否定句分以下情况：1、 句中有be动词(am, is, are, was,were)的，在be动词后加not；2、 句中有情态动词的（can, should, must, would等），在情态动词后面加not； 如：Ican run.Ican not run.3、 句中没有be动词和情态动词的，在动词前加dont或doesnt： 句中动词为原形的(即主语为第一人称I/we、第二人称you,第三人称复数they, two apples 等），加dont。如：Ilikeapples.Idontlikeapples.句中动词为三单式的(即主语为第三人称单数he/she/it/this book等），加doesnt，并将三单 式的动词还原成原形： 如：Helikesapples. Hedoesntlikeapples.时态为过去时的，要加didnt而且动词过去式要改为原形： 例:Iwenttoschoolyesterday. Ididntgotoschoolyesterday.4.肯定句中的some在否定句中应改为any 如：Therearesomestudentsintheclassroom. Therearenotanystudentsintheclassroom.习题训练：将下列肯定句变为否定句。1.Helikeshispenunder._2. Wegotothemeeting._3.Helikestheviolin._4.Mysistersingsbeautifully._5.Theyaredoingquestionsandanswerswiththeteachers._6. Myfatherhashislunchat11:30everyday._7. Thereisapolicemanatthecorneroftheroad._8.Thereissomewonderfulnewsintodayspaper._9.Theyareplayingontheplayground._10.TomoftentellsthemstoriesinFrench._11.Afterclasssomestudentsplayballs._12.HespeaksEnglish._13. Tomsbrotheriswalkinginthepark._ 14.WecomefromChina._15. ThestudentsofClass5arecleaningtheclassroom._16. TomandMaryarefriends._17. Therearesomebooksinthebookcase._18. Imastudent._ 19. Yourfathercanrideabike._ 20. Theycanplayfootballafterschool._二、 将下列否定句改为肯定句。1.Hedidntknowthenews._2. Wedontwanttohelptheoldman._3. Icantrememberyourhomework._4. Youshouldntlaughatothers._5. Youarentmybestfriend._6. Thelittleboydidntlikethelittlerabbits._7. Hedoesntlikeswimming._8. MaryandTomarentclassmates._9. Myfatherdoesnthaveacar._10. Mysistercannot finishtheworkinanhour._精品文档