七年级英语句型转换ppt课件内容预览：否定句疑问句一般疑问句特殊疑问句专项练习——句型转换祥富中学王金红一.肯定句变否定句1.1) I am a student.I am not a student.2) They are blue .They aren’t blue.3) He isKangkang.He isn’t Kangkang .句子中有be，在be后加not。谓语是动词原形，在动词前加don’t。ppt2.1) I have a book .I don’t have a book.2) They like Chinese .They don’t likeChinese.3) We come fromChina.We don’t come fromChina.3谓语动词是第三人称单数，在动词前加doesn’t，动词用原形。1)She has a small mouth.She doesn’t have a small mouth.2)Maria likesChina.Maria doesn’t likeChina.3)Jane comes from theU.S.A.Jane doesn’t come from theU.S.A.练习：将下列句子变成否定句。1. I am a teacher. I a teacher.2. We are students. We students.3. Jane is a girl. Jane a girl.4. They like English. They likeChinese5. I come from China. I come fromChina.6. He likes Chinese. He likeChinese.7. Maria comes fromCuba.Maria come fromCuba.8. We know Maria. We knowMaria.amnotaren’tisn’tdon’tdon’tdoesn’tdoesn’tdon’t二.肯定句变一般疑问句1.1) I am a student.Are you a student?2) They are blue.Are they blue?3) He isKangkang.Is heKangkang?句子中有be，把be提到句首2.谓语是动词原形，在句首加do。1) I have a book .Do you have a book?2) They like Chinese .Do they likeChinese?3) We come fromChina.Do you come fromChina?3.谓语动词是第三人称单数，在句首加Does，动词用原形。1) She has a small mouth.Does she have a small mouth?2) Maria likesChina.Does Maria likeChina?3) Jane comes from theU.S.A.Does Jane come from theU.S.A?4) She knowsMaria.Does she knowMaria?练习:将下列句子变成一般疑问句。1. I am a teacher.a teacher?2. They are students.Students?3. Jane is a girl.a girl?4. They like English.they likeEnglish?5. I come from China.you come fromChina?6. He likes Chinese.heChinese?7. Maria comes fromCuba.Maria fromCuba?8.We speak Chinese.youChinese?AreyouAretheyIsJaneDoDoDoeslikeDoescomeDospeak三.一般疑问句做肯定,否定回答Are you Maria ?肯定回 Yes ,主+助系.否定回答: No,主+助系+not.肯定回Yes , I am.否定回No,I’m not.2.问句和答语的助动词保持一致.1) Are you a student?肯: Yes, I am.否： No, I’m not.2) Is heKangkang?肯：Yes，he is.否：No，he isn’t.3) Do they likeChinese?肯：Yes,they do.否：No ,they don’t.4) Does she have a small mouth?肯：Yes,she does.否：No,she doesn’t.3.问句和答语中的主语保持一致。（必须用主格）1) Is Jane from theU.S.A?2) Does Kangkang come fromChina?3) Do Jane and Maria likeChina?4) Is this a ruler?肯:Yes,she is.否:No，she isn’t.肯:Yes,he does.否:No,he doesn’t.肯:Yes,they do.否:No,they don’t.肯:Yes,it is .否：No，it isn’t.5) Is that a desk?6) Are these books?7) Are those pencils?8) Are these erasers?9) Is that an orange?肯：Yes，it is.否：No，it isn’t.肯：Yes，they are.否：No，they aren’t.肯：Yes，they are.否：No，they aren’t.肯：Yes ,they are.否：No，they aren’t.肯：Yes ,it is .否：No，it isn’t.练习：给下列句子做肯定回答或否定回答。1.Are you a student?Yes,. No,.2. Do they likeEnglish?Yes,. No,.3.Is Jane a girl?Yes,. No,.