ПОставьте в вопросительную и отрицательную форму   We have mathematics today. I have a sister. My friends has English books. They had friends in Moscow.

We have mathematics today. Have   we mathematics today? We haven"t mathematics today. I have a sister. Have  I a sister? I haven"t a sister. My friends has English books. Has  my friends  English books?  My friends hasn"t English books.  They had friends in Moscow. Did they have friends in Moscow?They did"t have friends in Moscow.