Zero Conditional -
If you ... the exam, you ... the class. (not pass, fail)
If you don't pass the exam, you fail the class.
If the weather ... nice, we ... for a walk. (be, go)
If the weather is nice, we will go for a walk.
If you ..., ... the teacher. (not understand, ask)
If you don't understand, ask the teacher.
If I ... enough money, I ... some new shoes. (have, buy)
If I have enough money, I'll buy some new shoes.
You ... a car, until you ... a driving licence. (be allowed to drive, have)
You are not allowed to drive a car, until you have a driving licence.
Their teacher ... happy if they ... their exam. (be, pass)
Their teacher will be happy if they pass their exam.
... Pete if you ... sure what to ... (ask, not be, do)
Ask Pete if you're not sure what to do.
If we ... in time, we ... another game. (finish, be able to, play)
If we finish in time, we will be able to play another game.
When you ... the test, you ... a calculator.
(take, to be not allowed to use)
When you take the test, you are not allowed to use a calculator.
If he ... today, he ... even harder. (win, have to, study)
If he wins today, he will have to study even harder.