（１）If you have a problem, we will solve it.
（２）If I were rich, I would buy a castle.
例文① If I were a bird, I would fly to you.
例文② If he stood by us, we would succeed in this plan.
例文① I wish I were a bird.
例文② I wish I could fly to you.
If I had more money, I would travel abroad every year.
If I were you, I would't do a thing like that.
If I knew his phone number, I could call him.
I wish it were true.
I wish I had a driver's license.
I wish I were taller.