Change present to past
I was at the beach yesterday.
They are at the park today.
They were at the park yesterday.
He was so happy to see her.
We aren't at school today.
We weren't at school yesterday.
She isn't sick today.
She wasn't sick yesterday.
I am so busy today.
I was so busy yesterday.
They are at the park today.
He is at home today.
He was at home yesterday.
It is warm and sunny today.
It was warm and sunny yesterday.
The kids are so noisy today.
The kids were so noisy yesterday.