Would/Could you do me a favor?
I wonder if you could do me a favor?
I had been wondering if you could help me.
I beg a favor of you.
Could you spare me a few minutes, sir?
I would be very much obliged if you could/would 。。。
1~6表示礼貌可以在前面加Excuse me.
May I venture to ask you for a favor?或Please excuse me to make bold to ask you to do me a favor.（不常用）
如果是很熟的朋友之间，可以用比较随便的口气，如：Be a sport and lend me a hand(这里sport意为“气量大度的人”)，请别人帮忙还可以说“Would you give me a hand?”(问异性Would you give me your hand? 则是求婚。)
问陌生人时间可以用：“Excuse me, but could you tell me what time it is now? ”现在英语也趋向于简单明了，很少说“Would you be kind enough to tell me the time?”