如果某人 “不惜一切地帮助你，即使把最后一点家当都给你也在所不惜”，就可以用短语 “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”。

• Jack is such a nice guy – he would give his shirt off his back to help you out.
  杰克真是个大好人，他会竭尽所能地帮你。
• 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。