1. The boys are playing football in the yard now. (yesterday; just)

Ответ (EN):

1. The boys have just played football in the yard (present perfect).
2. The boys played football in the yard yesterday (past simple).

Перевод (RU):

1. Мальчики только что поиграли в футбол во дворе (настоящее совершенное время).
2. Мальчики играли в футбол во дворе вчера (простое прошедшее время).

Ответ: The boys have just played football in the yard. The boys played football in the yard yesterday.