Помогите пожалуйста нечего непонял!

I was playing computer games yesterday.i was playing computer games at 5 o'clock yesterday.He was playing computer games from 2 till 3 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 9 o'clock yesterday.What was he doing yesterday? He was reading a book.What was he doing the whole evening yesterday? He was reading a bookWas she sleeping when you came home? My brother was not playing tennis yesterday.He was playing tennis the day before yesterday.