英语句型转换-肯定句变否定句.ppt

一招搞定句型转换 Ms Liao 2018.09.16 1. I get up at 7 o’clock. _____________________________ 2. Mike is good at basketball. _____________________________ 3. Tom wants a cat. _____________________________ 4. They will go to the Great Wall. _____________________________ 课首小测 将下列句子改为否定句: 判断：肯定句or否定句 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) (否) (否) 秘诀 有be用be，有情用情，无情无be用助 not 何处安放？ be动词有三种形式，他们分别是： is am are be动词 can(可以，能够) will(将要) should(应该) 情态动词 助动词 do （原形） does（三单） did (过去式） 否定形式:don’t 否定形式:doesn’t 否定形式: didn’t 1) I am a student. 2) They are blue. 3) It is a dog . 1. 句子中有be，在be后加not。 缩写形式：is not=isn’t are not=aren’t am not不能缩写 I am not a student. They are not blue. It is not a dog. 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. You can pick apples . It will rain . I should drive . 2. 句子中有情态动词，在情态动词后加not。 You cannot pick apples. 缩写形式：cannot=can’t will not=won’t should not=shouldn’t It will not rain. I should not drive. 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. 如果原句子没有be动词也没有情态动词，  怎么办？ 注意：助动词后的动词要打回原形。 He doesn’t swim every day. ①I like autumn. I don’t like autumn. ②He swims every day. 打回原形 第三人称单数，主语后+doesn’t 3. 句子中无情无be，用助动词。 动词原形，主语后+don’t He has a shirt. ____________________ 2. They help each other. ____________________________ He doesn’t have a shirt. They don’t help each other. 将下列句子改为否定句: Exercise Now, you try! 1. I get up at 7 o’clock. _____________________________ 2. Mike is good at basketball. _____________________________ 3. Tom wants a cat. _____________________________ 4. They will go to the Great Wall. _____________________________