英语句型转换肯定句变否定句PPT学习教案

1、会计学11. 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(肯肯)(肯肯)(否否)(否否)第2页/共17页秘诀秘诀有有be用用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？第3页/共17页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

2、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=isnt are not=arentis not=isnt are not=arentam notam 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

3、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 apples.缩写形式：缩写形式：cannot=cantcannot=cant will not=will not=wont wont should not=

4、shouldnt 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页第11页/共17页注意：助动词后的动词要打回原形。He doesnt swim every day. I like autumn.I dont like autumn. He swims every day.打回原打回原形形第三人称单数，第三人称单数，

5、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 wa