6.How long ..( you/ study )have you studied.. English? - I ( learn ) have learnt English since I was twelve 37. The kids (sleep)were sleeping  when the bell rang. 38.The light (go) went .out when we were studying our lesson. 39.Sam ( already leave ) had already left .. when we ( get ) .got .there 40.While Dad ( watch ) was watching .. TV last night, Mum ( read ) was reading  the newspaper. 41.When I ( finish ) finish all this work, I will go for a walk 42.She got a job after she ( graduate ) had graduated. 43. When John and I got to the theatre, the movie (already / start) had already started . 44. Before Alice (go) went to sleep, she (call) had called . her family. 45. When the phone (ring) rang , I (have) was having  dinner. 46. He (teach) had taught in this school before he (leave) left  for England. 47.Two days ago, I (see)...saw......... an old friend who I (not see) haven't seen ..........for years 48. Angel asked me how to use the photocopier. She ...has never used ...... (never/ use) it before. 49. Karen .didn't want ....(not want) to come to the cinema with us yesterday because she.had already seen .(already/ see) the film. 50. Henry (live) had lived  in New York for ten years before he (move) moved to Chicago last month.