I played computer games yesterday.
I was playing computer games at five o'clock yesterday.
He was playing computer games from two till three yesterday.
We were playing computer games the whole evening yesterday.
What was Nick doing when you came to his place?
What were you doing when I rang you up?
I was not sleeping at nine o'clock yesterday.
What did he do yesterday? - He read a book.
What was he doing the whole evening yesterday? --He was reading a book.
Was she sleeping when you came home?
My brother did not play tennis yesterday.
He played tennis the day before yesterday.
My sister was not playing the piano at four o'clock yesterday.
She was playing the piano the whole evening.
When I came into the kitchen, mother was cooking.
She was cooking the whole day yesterday.
We washed the floor in our flat yesterday.
We were washing the floor in our flat from three till four yesterday.
Did you do your homework yesterday?
Were you doing your homework from eight till ten yesterday?
Why was she sleeping at seven o'clock yesterday?
He was sitting at the table the whole evening yesterday.