Conditional 1

If you are cold, take a jacket with you. / If you don't take a jacket with you, you will be cold.

If the phone is expensive, Patty might not buy it.

If you feel tired, you must go on holiday. / If you don't go on holiday, you will feel tired.

If Bill runs very fast, he will win the race./If Bill doesn't run very fast, he won't win the race

If you take a taxi, you won't be late for work. / If you don't take a taxi, you will be late for work.

If you write on the desk, the teacher will be angry.