如果你不是真的感兴趣，干吗费口舌打听呢？

Why bother asking if you're not really interested?

《牛津词典》

“好吧，”汉斯说，“如果她不是真的聪明，我就不会娶她。”

"Well," said Hans, "if she is not really smart, I won't have her."

youdao

如果那个男孩真的不是她的儿子，那怎么办呢？

What if the boy were really not her son, after all?

youdao

If it were true, probably it isn't true, but if it were true, that half of brain was enough, then half of the brain would be enough.

如果这是真的，也许这不是真的，但如果这是真实的，半边大脑就够用了，那就只需要半边大脑来判断。

耶鲁公开课 - 死亡课程节选

Because the IFs are saying, if it's true do this, otherwise skip on it.

因为IF是这样的，如果结果是真的，进行如下操作，如果不是那么跳过它吧。

麻省理工公开课 - 计算机科学及编程导论课程节选