陈述句： 肯定句 否定句
疑问句： 一般疑问句 特殊疑问句
一. 肯定句变否定句
1. 句子中有be，在be后加not
1) I am a student.
I am not a student.
2) They are blue .
They aren’t blue.
3) He is Kangkang.
He isn’t Kangkang .
2、谓语是动词原形，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.
3) We come from China.
We don’t come from China.
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 likes China.
Maria doesn’t like China.
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 a teacher.
2. We are students. We students.
3. Jane is a girl. Jane a girl.
4. They like English. They like Chinese
5. I come from China. I come from China.
6. He likes Chinese. He like Chinese.
7. Maria comes from Cuba.
Maria come from Cuba.
8. We know Maria. We know Maria.
二、肯定句变为一般疑问句变化规则
1)含be动词和情态动词的把它们提前。
2)没有情态动词/be两项的加do/does。
3)句末用“？”，开头单词字母大写。
（注；有第一人称的要变第二人称）
即：把I 变为you, 把we变为you, 把my变为your, 把our变为your; 把am变为 are。
1、句子中有be/情态动词，把他们提到句首
Be:am,is are
情态动词：can, may, could, would
1) I am a student.
Are you a student?
2) They are blue.
Are they blue?
3) He can play the guitar.
Can he play the guitar?
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 like Chinese?
3) We come from China.
Do you come from China?
2. 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 likes China.
Does Maria like China?
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. a teacher?
2. They are students. Students?
3. Jane is a girl. a girl?
4. They like English. they like English?
5. I come from China. you come from China?
6. He likes Chinese. he Chinese?
7. Maria comes from Cuba.
Maria from Cuba?
8.We speak Chinese. you Chinese?
三.一般疑问句做肯定,否定回答
Are you Maria ? 肯定回答：Yes , I am. 否定回答：No,I’m not.