Hello!
1) We haven't got separate bedrooms. My sister and I argue all the time.
If we had separate bedrooms, my sister and I wouldn't argue all the time.
2) I'm in a hurry. I won't stay for a meal.
If i weren't in a hurry, I would stay for a meal.
3) It's raining. I won't go for a job.
If it wasn't raining, I would go for a job.
4) He sits around all day.He isn't very fit.
If he didn't sit around all day, he would be very fit.
5) Teachers' salaries are very low. Not many people want to become teachers.
If teachers' salaries weren't very low, many people would want to become teachers.