past tenses: 1)Sandra (paint) for three years before she sold her first painting.2. While Lisa (read) a book her brother was listening to music.3. (the girls/help) you with the housework yesterday? 4.Tom was very tired.He (play) football for hours.5. Susan was very happy because she (win) the first prize.6. Lisa was very upset because she (have) a nightmare.7.The secretary (send) letters by the time her boss came to work.8. The research team (fimd) an unusual fossil and took it back to the lab.9.Alex (not/go) to school yesterday.10.As Tony (play) computer games,his sister was watching TV.11.Nick (wait) for an hour before her friend arrived.12.We (not/go) to school yesterday.13.What (do) yesterday? 14. I (see) you in the morning.

1) Had painted2) was reading3) did the girls helped 4) he has been playing5) вот тут я не уверена, либо had won, либо won6) had7) had sent8) filmed9) didn't go10) was playing11) had been waiting12) didn't go13) did you do14) saw