If the weather is good, we will have a picnic tomorrow.
If she has a toothache, she goes to a dentist.
If he misses his bus, he will be late for school.
If you do not stop jumping around, you will hit your head
If I were you, I would take an aspirin.
If you mix yellow and blue, you get green.
If they eat sweets all day, they get fat.
If John was here, he would help us.
If you add some sugar to coffee, it becomes sweeter.