The crassrooms are big.
否定句: The classrooms aren't big.
一般疑问句: Are the classrooms big ?
肯定回答: Yes, they are.
否定回答: No, they aren't.
Our Chinese teacher is tall.
否定句: Our Chinese teacher isn't tall.
一般疑问句: Is your Chinese teacher tall ?
肯定回答: Yes, she is.
否定回答: No, she isn't.
I am eleven years old.
否定句: I am not eleven years old.
一般疑问句: Are you eleven years old ?
肯定回答: Yes, I am.
否定回答: No, I'm not.