Ну ни как не могу подойти к учительнице. а работу нужно сдать завтра. she is the girlfriend home. альт. отриц. общий. раздел. he was at school yesterday. альт. отриц. общий. раздел. we do not monkey. альт. отриц. общий. раздел.

She is her friend's home. 
Is  she at her friend's or her aunt's home?
Isn't she at her friend's home?
Is she at her friend's home?
She is at her friend's home, isn't she?
специальный - Where is she?

he was at school yesterday.

Was he at the school or at home yesterday?
Wasn't he at school yesterday?
Was he at school yesterday?
He was at school yesterday, wasn't he?
специальный Where was he yesterday 

We are not monkeys. 

Are we  monkeys or tigers?
Aren't we monkeys?
Are we monkeys?
We are not monkeys, are we?
специальный - Who are not monkeys? 

На всякий случай написала специальные вопросы 

She is away at her girlfriend's home.

Is she at her girlfriend's home or at the station?
She is not away at her girlfriend's home.
Is she at her girlfriend's home?
She is at her girlfriend's home, isn't she?

He was at school yesterday.

Was he at school or at home yesterday?
He was not at school yesterday.
Was  he at school yesterday.
He was at school yesterday, wasn't he

We aren't monkeys

Aren't we monkeys or not?
We aren't monkeys
Aren't we monkeys?
We aren't monkeys, are we?