Ответ:
1) English is an international language.
Is English an international language? - Yes, it is.
No, it's not. English is not an international language.
2) Jack hates Maths.
Does Jack hate maths? - Yes, he does.
No, he doesn't. Jack doesn't hate maths.
3) We will take private lessons from this teacher next year.
Will we take private lessons from this teacher next year? - Yes, we will.
No, we won't. We won't take private lessons from this teacher next year.