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。