a) people didn't play computer games.
b) people didn't listen to pop music.
c) people didn't drive cars.
d) people didn't eat hamburgers.
e) people didn't have television.
f) people didn't wear jeans.
Past Simple имеет 3 вс слова Did/Was/Were. Was/Were - был/была/были../.../...
Что бы сделать отрицание: вс слово + первая форма глагола.
