1. i am not rich, so I can't be a volunteer.   If I were rich, I could be a volunteer.

2. the weather is cold, so we stay at home     If the weather were fine, we would go out.

3. i don't study hard, so i get bad marks   If I studied hard, I would get good marks.

4. mai doesn't help me, so i can't finish my work.     If Mai helped me, I could finish my work.

5. my mother isn't there, so she can't help me.    If my mom were here, she would help me.

6. i am tired, so i have to stay at home.    If I were fine, I would go out.

7. i have not done exercises, so i don't go out with you       If I finished my exercises, I would go out with you.

8. i don't have free time, so i can't play soccer.  If I had time, i could play soccer.