这3句子,
I come from China.
I am doing my homework.
They are having an English ckars.
这里开始下面就是它们的否定句,一般疑问句,肯定回答,否定回答,
1.I don't come from China.
Do you come from China?
--Yes,I do
--No,I don't
2.I am not doing my homework.
Are you doing your homework?
--Yes,I am.
--No,I am't.
3.They aren't having an English ckars.
Are they having an English ckars?
--Yes,they are.
--No,they are't.
我只是想知道,比如第一个为什么要加上don't 改成一般疑问句为什么要用Do you
第二个,为什么要加上not 改成一般疑问句为什么要加Are you ,
第三个,为什么要加上aren't 该成一般疑问据为什么要加上,Are they
请各位仔细讲解下,刚考试学,