Present Perfect (2) 1 * Complete each pair of sentences with for and since. 1 a We've been in this room for an hour and a half. b We've been in this room 9.30 a.m. 2. January three months. a I've had my Saturday job b I've had my Saturday job 3 a I've had this idea b I've had this idea my birthday. a long time. 4 he a Tom has wanted to be a police officer was a young boy. b Tom has wanted to be a police officer ages.