下列句子改为否定句、肯定句和一般疑问句,英语高手们速度了

We are happy.
Yes,we are happy.
No,we are not happy.
Are we happy?
Yes,she does go to school at seven o'clock.
No,she doesn't go to school at seven o'clock.
Does she go to school at seven o'clock?
Yes,they do play football in the afternoon.
No,they don't play football in the afternoon.
Do they play football in the afternoon?

We aren't happy.
Are you happy?
She doesn't go to school at seven o'clock.
Does she go to school at seven o'clock?
They don't play football in the afternoon.
Do they play football in the afternoon?