Ответ:
№1
1) had grown - Past Perfect
2) had lost - Past Perfect
3) had been swimming - Past Perfect Continuous
№2
1) I could smell cigarettes. Somebody had been smoking.
2) She had been working here for over 2 years before you started working here.
3) She had been playing the trumpet for 3 years before she joined a band.
№3
1- said
2-met
3- bought
Объяснение:
Past Perfect образуется при помощи второй формы глагола to have — had и третьей формы смыслового глагола (Past Participle). Третья форма правильных глаголов образуется с помощью окончания –ed, а для неправильных см. Неправильные глаголы. (Прикрепляю таблицу)
Подробное образование предложений смотрите в таблице.