If I don't……If he doesn't……

2 

    If I don't finish my homework on time, my teacher will be mad at me. If my teacher is mad at me, she will call my parents. If she calls my parents, my parents will be mad at me. If my parents are mad at me, I won't get pocket money. If I can not get pocket money, I will be very pool. If I am very pool, I can not buy the thing I like.

    If he doesn't work hard, he will get a bad grade. If he gets a bad grade, his parents will be angry with him. If his parents are mad at him, he won't get any pocket money. If he doesn't get any pocket money, life will be difficulet and he can not buy everything in the shop.