介词 “of ”有十几用法,无法用两三句话说清楚,请去查有关语法书.其中一种用法是：形容词＋of ＋（代）名词,如：How kink of you to help .你来帮助我太感谢了.（你多好啊!来帮助我）It was good of your brother to...