If you heat water to 100° C, it boils. / Water boils if you heat it to 100° C.
If I don't practice the piano everyday I play poorly. / I play the piano poorly if I don't practice everyday.
Does your mom get mad if you don't call her? / If you don't call your mom, does she getmad?
If people eat too much, they get fat.
If you touch a fire, you get burned.
If Bill studies, he will pass the exam. / Bill will pass the exam if he studies.
If it doesn't rain, we will go to the beach. / We will go to the beach if it doesn't rain.
Will you take the train if you miss the bus? / If you miss the bus, will you take the train?
If it doesn't rain, we may go to the beach.
If it doesn't rain we should go to the beach.
If I won the lottery, I would travel around the world. / I would travel around the world if Iwon the lottery.
If Rachel had more time, she would learn to play the guitar. / Rachel would learn to play the guitar if she had more time.
Would you be happy if you were to get married? / If you were to get married, would yoube happy?
If I met the Queen of England, I would say hello.
She would travel all over the world if she were rich.
If I had known then what I know now, I would have done things differently. / I would have done things differently if I had known then what I know now.
Suzanne wouldn't have had the heart attack if she had gone on a diet as her doctor recommended. / If Suzanne had gone on a diet as her doctor recommended she wouldn't have had the heart attack.
Would you have liked to go to university if you had been able to afford it? / If you had been able to afford it, would you have liked to go to university?
If we had taken a taxi, we wouldn't have missed the plane
She wouldn't have been tired if she had gone to bed earlier