Yes / No Questions

Is Mary here? 

A= Yes, she is    /     No, She's not

ESTRUCTURA : Verb To Be + Sujeto + Complemento + ?

A= Yes + Pronombre + Verbo To be

A= No,+ Pronombre + Verbo To be + not

Ejemplos :

Are they late ? Yes, they are No, they're not They're not late

Is he sick? Yes, he is No,he's not He's not sick

Is Jun here ? Yes, she is No, she's not She's not here

Are we at the cafeteria ? Yes, we are No, we're not Wer're not at the cafeteria

Am I late ? Yes you are No, you're not You're not late

Is it hard work ? Yes, it is No, it's not It's not hard work

Are you busy? Yes, I am No, I'm not I'm not busy