And now, if you please, he wants me to rewrite the whole thing!

哼！你们听听，他竟要我全部重写！

《牛津词典》

There is only so much fuel in the tank and if you burn it up too quickly you are in trouble.

油罐里只有这么多燃料了，如果你用得太快，就有麻烦了。

《柯林斯英汉双解大词典》

If you stop making excuses and do it you'll wonder what took you so long.

如果你停止辩解而开始行动，你就会惊讶是什么让你耗费了这么长的时间。

《柯林斯英汉双解大词典》

So if you play cat and mouse with someone, you change between different kinds of behavior when dealing with another person.

VOA: special.2009.09.27

The final exam: you should do well if you read, and if you come to lecture and if you attend section.

期末考：如果你读了，上课了，讨论了,期末考试对你来说将轻而易举。

耶鲁公开课 - 1945年后的美国小说课程节选

If you keep that in mind, and if you're just not shy, I mean, of course you're shy. Everybody's shy.

如果你能记住这个，而且你不害羞，当然你会害羞。所有人都会。

生存英语 - SpeakingMax英语口语达人

And if you'll roll up your sleeves, and if you'll work with me and knock on some doors with me and make some calls with me, we'll win Scott County again.

WHITEHOUSE: The White House

We've seen this, where oftentimes, the wireless community can get up and be operational, but if you evacuate and you forget your chargers and your phone dies, or if you're without power not knowing how to charge things.

WHITEHOUSE: Press Briefing

And if you can and you are convinced he has heard, does he have any obligation to say something?

CNN