People will get fat, if they eat junk food.
People would get fat, if they ate junk food.
If a person practises sports, he or she will always feel good.
If a person practised sports, he or she would always feel good.
She will pass the test if she studies hard.
She would pass the test if she studied hard
If dogs have wings, they are will be able to fly
If dogs had wings, they are would be able to fly
If I am you, I shall drive more carefully in the rain
If I were you, I should drive more carefully in the rain
Paula will be sad if Jan leave
Paula would be sad if Jan left