肯定句变为否定句的方法；
一般疑问句的回答
1）肯定句变为否定句的方法
把肯定句改成否定句分以下情况：
1、 句中有
be动词的，在be动词后加not；
2、 句中有
情态动词的（can ,should，must ，would），在情态动词后面加not；
3、 句中没有be动词和情态动词的，在动词前加don’t或doesn’t ；
① 句中动词为原形的，加don’t .如： I like apples. àI don’t like apples.
② 句中动词为三单形式的，加doesn’t，并将三单式的动词还原成原形。
如：He likes apples.à He doesn’t like apples.
4.肯定句中的some在否定句中应改为any
如：There are some students in the classroom.
à There are not any students in the classroom.
2) 一般疑问句的回答
a) Is Jim a student? b) Can I help you?
c) Does she like salad? d) Do they watch TV?
e) Is she reading?
肯定回答: a) Yes, he is. b) Yes, you can.
c) Yes, she does. d) Yes, they do. e) Yes, she is.
否定回答: a) No, he isn’t. b) No, you can’t.
c) No, she does’t. d) No, they don’t.
e) No, she isn’t.
由Be动词来问，也由Be 动词来回答be : am is are
Am I a teacher? Yes, you are . No, you aren't.
Is he Tom? Yes, he is. No, he isn't.
Is she your friend? Yes, she is . No, she isn't.
Is Lucy 8 years old? Yes, she is. No, she isn't.
由
助动词do, does提问，也用它们来回答
Do you have a book? Yes, I have. No, I haven't.
Does he have a pen? Yes, he does. No, he doesn't.
Does it like to sleep? Yes, it does. No, it doesn't.
情态动词，用can 问，也用它来答
Can he swim? Yes, he can. No, he can't.
把下列句子改写为否定句、一般疑问句并做肯定、否定回答1. His father is an English teacher.
(否定句)His father is not an English teacher.
（一般疑问句）Is his father an English teacher?
Yes, he is. No, he isn’t.
2. They can swim.(cannot)
They cannot(can’t) swim.
Can they swim? Yes, they can. No, they can’t.
3. I like reading English.
I don’t like reading English.
Do you like reading English? Yes, I do. No, I don’t.
4. His sister goes to school on foot.
（否定句）His sister doesn’t go to school on foot.
（一般疑问句）Does his sister go to school on foot?
Yes, she does. No, she doesn’t.
5. Mrs Li and Kitty watch TV at night.
Mrs Li and Kitty don’t watch TV at night.
Do Mrs Li and Kitty watch TV at night?
Yes, they do. No, they don’t.
6. I do my homework after school.
I don’t do my homework after school.
Do you do your homework after school?
Yes, I do. No, I don’t.
课后练习
把下列句子改写为否定句、一般疑问句及肯定、否定回答
1. The boy does some housework at home.
2. We are from China.
3. Jim has some books.
4. I have a football book.
5. My aunt often watches TV.
6. My parents can play ping-pong.
7. They are my grandparents.
8. Gina wants a cup of coffee
Are you a student?
Are you students?
Does he look cool?
Can she draw?
Can they dance?