If I knew this from the beginning, I wouldn’t have asked you to do it for me.; . If it had rained it would've been a disaster.; . If she got to university so late, she wouldn’t have had these problems in her career.; . If you would've stayed on that drilling rig and I wouldn't have been confronted with such storms, I don’t think you would argue against my leaving that place.; . If I had known how to solve the problems in chemistry, I would've passed the exam in the winter session.