Ответ: 1. I had been working hard all day. — Я усердно работал весь день.2. They had been playing football. — Они играли в футбол.3. Somebody had been smoking in the room. — Кто-то курил в комнате.4. She had been dreaming. — Она видела сны.5. He had been watching TV. — Он смотрел телевизор.