give the shirt off their back 来描述这个人的行为，意思是 “倾囊相助，尽力帮忙”。

【例句】
I’d give you the shirt off my back to help you pay for your wedding.
为了资助你支付婚礼的费用，我会倾囊相助。

I’m afraid even giving me your shirt off your back will not help me pay for my new house. But thanks for the offer.
即使你倾囊相助，恐怕都无法帮我支付新房子的钱。但还是要感谢你的好意。