Why don't you ask his advice?

你为什么不征询他的意见？

《牛津词典》

Why don't you ask him for his advice?

你为什么不征求他的意见？

《牛津词典》

Why don't you ask him outright if it's true?

你为什么不直截了当地问他那是否属实？

《牛津词典》

Then, I was talking it over with another graduate student and he said, well if you want to find out why don't you ask J.R. Hicks?

随后,我和另一位研究生讨到了此问题,他说,如果你想知道,干嘛不直接去问J·R·希克斯

耶鲁公开课 - 金融市场课程节选

But one reason why they ask for money is if you don't pay for therapy you don't think it has any value.

但他们收钱的其中一个原因是,不用付钱的心理治疗，你会觉得它没什么用。

耶鲁公开课 - 心理学导论课程节选

Now you might ask, well if we did 360 here, why don't we just do 360 over here?

你们可能会问,既然我们这里用360,那么那里为什么不用360

耶鲁公开课 - 金融市场课程节选

Mr. HARRIS: (As Carl Fogaty) Why don't you ask Tom about his older brother Richie.

NPR: 'A History of Violence': A Ticking Timebomb

You don't ask Linford Christie to run in a circle do you, so why should swimming be any different.

BBC: The untouchables

Now, some people ask, well, why don't you just pass that and forget everything else?

WHITEHOUSE: "White House to Main Street" Town Hall: Elyria, OH