Answer:
If I have homework, I won't watch a film this evening.
If it doesn't rain next weekend, I will go on an excusion
If I forget my friend's birthday, he won't be happy.
If you do not eat healthy food, you will be fat.
We will go to the zoo if my friend comes to visit me.
He will miss the train if he doesn't wake up.
My parents won't be happy if I don't pass my exams.
I will go skiing if I pass all my exams.