Read these sentences and fill in the gaps with the correct verb form in the past perfect continuous. example 0. john his dog all day. he was tired yesterday. (walk) answer 0. had been walking. 1. i could smell cigarettes. (smoke) 2. she for over 2 years before you started working here. (work) 3. for four years. it was exciting. (learn)
1. Had been smoking
2. Had been working
3. Had been learning