If I were rich, I would travel around the world.
金持ちなら世界一周旅行をするのだが
If I were you, I'd take it as a compliment.
私なら賛辞と受け止めるよ
If it had not been for your help, I could not have managed.
君の助けがなければとてもできなかったでしょう
if it suits your convenience
ご都合がよろしければ
If it were not for air, all living things would die.
空気がなければすべての生物は死んでしまうだろう
if it were stored anywhere else
もしそれがどこか他の場所に保存されていたら
If it were to rain [((形式))Were it to rain], I would stay home.
万が一雨が降るようなら家にいます
If it's heads, we'll go.
表が出たら行くことにしよう
if my budget permits
予算が許せば
if my mathematics is [are] correct, ...
私の計算が正しければ…
