"scratch your back" in Chinese (Simplified)

挠你的背帮你（表达）- 帮你一个忙

Definition

字面意思是用手或别的东西给你的背挠痒。作为表达时，意思是帮某人或为其效劳，通常也希望以后对方能回报你。

既可以字面理解（真的挠痒），也可用于表达‘你帮我，我帮你’。口语表达通常有互相帮忙、交换好处的意味，有时含点自私。字面意思很简单，就是挠背。

Can you scratch your back by yourself?

你能自己**挠你的背**吗？

Sometimes it's hard to scratch your back without help.

有时候没有人帮忙很难**挠你的背**。

I will scratch your back if you help me with my homework.

如果你帮我做作业，我就**帮你挠背**。

We all know the saying, 'If you scratch my back, I'll scratch yours.'

大家都知道那句：“你**帮我挠背**，我帮你挠背。”

He offered to scratch her back at work so she'd support his idea later.

他主动**帮她挠背**，这样她以后就会支持他的想法。

Politicians love to scratch each other's backs when it comes to favors.

政客们在好处方面总喜欢**互相挠背**。