11)1.had been studying
2.had played
3.had been walking
4.had ended
5.had lived
6.had been studying
7.had practised
12)
1.had been waiting
2.had planted
3.had been cooking
4.had been practising
5.had done
6.had rained
7.had been learning
11)1.had been studying
2.had played
3.had been walking
4.had ended
5.had lived
6.had been studying
7.had practised
12)
1.had been waiting
2.had planted
3.had been cooking
4.had been practising
5.had done
6.had rained
7.had been learning