ask for后面加什么词

He was so busy that he had to ask for help.

他太忙了，不得不请求帮助。

I know that this is a bad time to ask for help.

我知道在这时候要求帮助不合适。

You can ask for a chemical analysis of your tap water.

你可以要求给你的`自来水做化学分析。

Is it too much to ask for a little quiet?

请略微安静一点儿，这个要求过分吗？

You're quite within your rights to ask for your money back.

你完全有权要回你的钱。