I wonder if you can help me.

不知您是否能帮我的忙？

《牛津词典》

I'll invite people if you can organize food and drinks.

如果你能备办饮食，我就负责请人。

《牛津词典》

If you can manage to get two tickets that's better still.

要是你能设法弄到两张票，那就更好了。

《牛津词典》

"I don't care," he said. "I am the only person who can tell you if your wine man has cheated you.

VOA: special.2009.02.07

I think she is a character that you can--if not identify with--at least, you can understand and be interested in.

也至少能够理解和感兴趣的角色，所以，在这本书，还有我们下次。

耶鲁公开课 - 1945年后的美国小说课程节选

So the idea is, if you can take a cell... you can take a stem cell from your body

所以如果你能够取得一个细胞……如果你能够从你体内取得一个干细胞，

关于干细胞的研究 - SpeakingMax英语口语达人

She left me... said if you can't handle grilled cheese you have a problem.

NPR: Tennessee Voters Will Be Going on Faith

The U.S. and its allies should stop playing catch me if you can.

FORBES: Sanctions On Iran: How Washington Can End The Game Of 'Catch Me If You Can'

Spotlighted destinations include Tikal, Guatemala -- which prompted BBC Travel reader Alex Berger to comment that he thinks Tikal is "far more impressive than Chichen Itza.... if you can get there!"

BBC: In brief: A new airline called Wow and other travel tweets