1) Helen could have taken part in the concert, if she could sing or could play the violin.
2) The crew will lose the competition if they won't train.
3) I would be happy if my favorite team would score.
4)if the police worked well, thieves wouldn't steal children's bikes.
5)people often fall ill if they do go in for sport.
6) Bob would set a record if he would train hard.
7) If I had money I would have bought skates,
8) if bob had tool he would have been able to repair you TV set.