it's后面怎么会有of呀

It's good for 和 It's good of有什么区别,后面接的是sb it's good ...后面加for 还是of? How could it come to this?怎么会这样?come有没有 s it's great to see what's left of you 请问后面的 what's left of yo It was from a good friend of his 后面是填 mother's 还是 mother Most of the people know it.most表示复数为什么后面的know不加s. it's my turn some of the regular stuff.turn后面是不是应该加上to? 英语翻译特别是will后面怎么会跟随of.应该如何应用这种句型? 有没有 it is of great +抽象名词 +to do sth?it is of great +抽象名词 后面到 It's a round round egg.round 后有of It's the matter of time有语法错误吗? it's adj of\for 有什么区别