I'd like a pay raise.

我想要加薪。

I am going to ask the boss for a raise.

我要找老板要求加薪。

I hope you will consider giving me a pay raise.

请您认真考虑给我加薪。

My monthly gross salary should increase 500 yuan.

我每月的总收入应该涨500元。

I demand a pay raise.

我要求增加工资。

I should grasp the opportunity to ask for a higher salary.

我应抓住机会要求加薪。

It's unfair if you don't pay me more.

如果对不多付我一些钱，就是不公平。

If you don't give me a raise, I will quit.

如果你不给我增加工资，我就辞职。