1 had gone to bed, we watched television
2 had a swim for 5 days
3 met him for 5 months
4 gone to this club since 1999
5 come to this city since July
6 learned French since 2001
7 played chess for 3 years
8 smoked for 5 years
9 there, Jack had left the office
10 I have visited England
11 the first time I have met this lady
12 I was having dinner, the phone rang
13 we arrived there, David had left the party
14 used to wear glasses before
15 ages since we last went to a concert
16 saw her friends when she left for the United states
17 the first time I have stayed in such an expensive hotel