解析My dirty hands left a spot where I would have signed it
问题描述：
解析My dirty hands left a spot where I would have signed it
答
很想帮你，但能力有限
不知道为什么用would have signed ，像虚拟语气一样
意思大概是 我的脏手上留下一个斑点，那是我曾做记号的地方
答
My dirty hands (主语）left （谓语）a spot（宾语） where I would have signed it（地点状语从句）
意为：
我的脏手在我签字的地方弄出了一个污点