Ответ:
1 I wish I were better at sports, then I would join in with my friends.
2 If only Frank stopped playing the drums at night, I would sleep.
3 I wish the sun came out! It has been cold for ages!
4 Sometimes, Jane wished she had more free time to paint.
5 If only our friends came to the party, then it would be a great success.
6 If you didn't break the rules every time you played, maybe we would let you join the team.