I worked hard yesterday.
Did I work hard yesterday?
I didn't work hard yesterday.
She wrote a letter two days ago.
Did she write a letter two days ago?
She didn't write a letter two day ago.
I washed my hands.
Did you wash your hands?
I didn't wash my hands.
We found our car.
Did we find our car?
We did not find our car.
We saw Jeremy in the bank.
Did we see Jeremy in the bank?
We didn't see Jeremy in the bank.