sth for sb和 sth to sb有什么区别，给某人的一本书用什么好

Question

如题，O(∩_∩)O谢谢

Answer 1

sth for sb
为sb做了什么
i did this for him
我这么做都是为了他
i buy this for him
这是为他买的

sth to sb
who did this to him
谁对他做了这些事
i did this to him
我对他做了这些事
i lie to him
我对他撒谎

给某人的一本书用什么好
i give this book to 某某
为某某买的书
i buy this book for 某某