3)Jane comes from the U.S.A. Jane doesn’t come from the U.S.A.
练习：将下列句子变成否定句
1. I am a teacher. I am not a teacher.
2. We are students. We aren’t students.
He isn’t Kangkang .
注意缩略形式：isn’t, aren’t
如果句子中没有be (am, is ,are), 只有行为动词原形，在动词前加don’t
1) I have a book . I don’t have a book.
2) They like Chinese . They don’t like Chinese.
2) Is he Kangkang? Yes, he is. No, he isn’t.
3) Do they like Chinese? Yes, they do. No, they don’t.
4) Does she have a small mouth? Yes, she does. No, she doesn’t.
专项练习 ——句型转换
英语的句子类型
肯定句 陈述句
否定句 疑问句 一般疑问句
特殊疑问句
一.肯定句变否定句
句子中如有be (am, is, are)，在be后加not 1) I am a student.
I am not a student. 2) They are blue .
They aren’t blue. 3)udents. Are they Students?
3. Jane is a girl.
Is Jane a girl?
4. They like English. Do they like English?
5. I come from China. Do you come from China?
3) We come from China. We don’t come from China.
如果行为动词是第三人称单数， 在动词前加doesn’t，行为动词恢复原形
1)She has a small mouth. She doesn’t have a small mouth.
2)Maria likes China. Maria doesn’t like China.
7. Maria comes from Cuba.
Maria doesn’t come from Cuba. 8. We know Maria. We don’t know Maria.
二、肯定句变为一般疑问句
句子中如有be动词(am, is, are)，把它们提到句首 1) I am a student. Are you a student ? 2) They are blue. Are they blue ? 3) He is playing football. Is he playing football ?
3) Jane comes from the U.S.A. Does Jane come from the U.S.A?
4) She knows Maria. Does she know Maria?
练习:将下列句子变成一般疑问句
1. I am a teacher. Are you a teacher?
注意：I 变 you, we 变 you； my 变 your, our 变 your
如果主语后面动词是第三人称单数 在句首加Does，后面动词恢复原形
1) She has a small mouth. Does she have a small mouth?
2) Maria likes China. Does Maria like China?
6. He likes sports. Does he like sports?
7. Millie comes from the USA.
Does Millie come from the USA?
8.We speak Chinese. Do you speak Chinese?
三. 一般疑问句的肯定和否定回答
3) Do Jane and Maria like China? Yes, they do. No, they don’t.
注意：I 变 you, we 变 you； my 变 your, our 变 your
如果主语后面只有动词原形，在句首加Do
1) I have a book . Do you have a book?
2) They like Chinese . Do they like Chinese?
3) We come from China. Do you come from China?
注意：问句和答语中的主语在保持一致 的前提下可以使用对应代词
1) Is Jane from the U.S.A? Yes, she is. No, she isn’t.
2) Does Kangkang come from China? Yes, he does. No, he doesn’t.
注意：问句和答语中的主语在保持一致 的前提下可以使用对应代词
Are you Daniel ? 肯定回答：Yes , I am. 否定回答：No, I’m not.
肯定回答： Yes , 主+ be/助动词.
否定回答: No, 主+be/助动词+not.
注意：问句和答语的助动词一定要保持一致
1) Are you a student? Yes, I am. No, I’m not.
3. Jane is a girl.
Jane isn’t a girl.
4. They like English. They don’t like English.
5. I come from China. I don’t come from China.
6. He likes Chinese. He doesn’t like Chinese.