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1、1.I get up at 7 oclock._ 2.Mike is good at basketball._ 3.Tom wants a cat._ 4.They will go to the Great Wall._课首小测课首小测将下列句子改为否定句将下列句子改为否定句:第1页/共17页判断:肯定句判断:肯定句or否定句否定句1.I am a doctor.2.I am not a doctor.3.He goes to school by bike.4.He does not go to school by bike.(肯肯)(肯肯)(否否)(否否)第2页/共17页秘诀秘诀有有be用用
2、be,有情用情,无情无,有情用情,无情无be用助用助not 何处安放?何处安放?助?be?情?第3页/共17页 be动词有三种形式,他们分别是:isamarebe动词第4页/共17页 can(可以,能够)will(将要)should(应该)情态动词第5页/共17页 助动词do(原形)(原形)does(三单)三单)did(过去式)过去式)否定形式:dont 否定形式:doesnt 否定形式:didnt第6页/共17页1)I am a student.2)They are blue.3)It is a dog .1.句子中有句子中有be,在,在be后加后加not。缩写形式:缩写形式:is not=
3、isnt are not=arentam not不能缩写不能缩写I am not a student.They are not blue.It is not a dog.第7页/共17页将下列句子改为否定句将下列句子改为否定句:1.It is a tiger.It is not a tiger.2.You are short.You are not short.第8页/共17页1)You can pick apples .2)It will rain .3)I should drive .2.句子中有情态动词,在情态动词后加句子中有情态动词,在情态动词后加not。You cannot pick
4、 apples.缩写形式:缩写形式:cannot=cant will not=wont should not=shouldnt It will not rain.I should not drive.第9页/共17页将下列句子改为否定句将下列句子改为否定句:Lily and Tom will walk to school.Lily and Tom will not walk to school.第10页/共17页如果原句子没有如果原句子没有bebe动词也没有情态动动词也没有情态动词,词,怎么办?怎么办?第11页/共17页注意:助动词后的动词要打回原形。He doesnt swim every
5、day.I like autumn.I dont like autumn.He swims every day.打回原形打回原形第三人称单数,第三人称单数,主语后主语后+doesnt3.句子中无情无句子中无情无be,用助动词。,用助动词。动词原形,主语后动词原形,主语后+dont第12页/共17页1.He has a shirt._2.They help each other._He doesnt have a shirt.They dont help each other.将下列句子改为否定句将下列句子改为否定句:第13页/共17页ExerciseNow,you try!第14页/共17页1.I get up at 7 oclock._ 2.Mike is good at basketball._ 3.Tom wants a cat._ 4.They will go to the Great Wall._ I dont get up at 7 oclock.Mike is not good at basketball.Tom doesnt want a cat.They will not go to the Great Wall.第15页/共17页谢谢观赏By Qiming English第16页/共17页感谢您的观看!第17页/共17页
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