I was / were at the beach.
was
What was the weather like yesterday?
It was foggy.
Were you at the skate park yesterday?
Yes, I was.
Was it snowing yesterday?
Yes, it was.
Were you in the countryside yesterday?
Yes, I was.
Was it cloudy yesterday?
No, it wasn't.
What was the weather like yesterday?
It was sunny.
I was at the beach.
False!
We wasn't / weren't in the forest.
weren't
Were you at the lake yesterday?
No, I wasn't.
I wasn't / weren't in the city.
wasn't
Were you at the beach yesterday?
No, I wasn't.
I was at home.
False!
Was it windy yesterday?
Yes, it was.
We was / were at the playground?
were
I wasn't at the zoo.
True!
I was in the mountains.
True!
What was the weather like yesterday?
It was cloudy.