Mary: If I don't go out so much, I will do more work
If I do more work, I'll pass my exams.
If I pass my exams, I'll enter the university.
If I enter the university, I'll study economics.
If I study economics, I'll earn a good salary.
Paul: If i stop smoking, ill have more money.
If I have more money, I'll save some every week.
If I save some every week, I'll be rich when I'm thirty.
If I'll be rich when I'm thirty, I'll have my own business.
If I have my own business, I'll make a lot of money,
If I make a lot of money, I'll retire when I'm forty.