You are apostman改为否定句、一般疑问句、肯定回答、否定回答

1.You are apostman（应该为postman）
否：You aren't postman.
疑：Are you postman?
肯答：Yes,I am.
否答：No,I'm not.
2.You are workers.
否：You aren't workers.
疑：Are you workers?
肯答：Yes,we are.
否答：No,we aren't.
3.We are in the park.
否：We aren't in the park.
疑：Are we in the park?
肯答：Yes,we are.
否答：No,we aren't.