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。
I'm going to ask for a rise.
我打算要求加薪。
Don't be too proud to ask for help.
不要放不下自尊而不求人帮忙。