Were you at the pool yesterday?
No, I wasn't.
Where were you yesterday?
I was at the pool.
Where were they yesterday?
They were at the book store.
Were they at the hospital yesterday?
No, they weren't.
Where were they yesterday?
They were at the toy store.
Were they at the hair salon yesterday?
Yes, they were.
Where were they yesterday?
They were at the coffee shop.
Were they at the flower shop yesterday?
Yes, they were.
