Краткий ответ в отрецательной и положительной форме.
Пример: Is the clock on the wall? Yes,it is;no,it isn't

Will your friend become a teacher?
Do you go to school every day?
Are your summer plans interesting?
Was it cold yesterday?

Will your friend become a teacher?  No, he won't; yes, he will.

Do you go to school every day?  No, I don't; yes, I do.

Are your summer plans interesting?  No, they aren't; yes, they are.

Was it cold yesterday? No it wasn't; Yes, it was.