1. Could you give me a raise?
能不能给我加薪？
还能这样说：
Would you like to give me a raise?
May I have a pay raise?
谚语：
You get what you pay off.
一分价钱，一分货。

2. I'd like to have a chance of a pay raise.
我希望加薪水。
还能这样说：
I would like to ask you for a raise.
I want to have a chance to get a pay raise.
谚语：
A big tree falls not at the first stroke.
一斧子砍不倒大树。

3. I need a raise.
我需要加薪。
还能这样说：
I want to get a pay raise.
I'd like to have a pay raise.
谚语：
It takes an entire village to raise a child.
抚养一个孩子需要倾一村之力。

4. Boss, do you think we could talk about my current salary?
老板，我们能谈谈我现在的工资问题吗？
还能这样说：
Boss, do you have time to talk about with me about my current salary?
Boss, would you like to talk about my current salary with me?
谚语：
Do business, but be not a slave to it.
应为事之主，勿为事之奴。