Buy sb sth,too short and tight

get/buy sth. for sb. = get/buy sb. s
groupwork 活动,另备有同步全英教学简案 unit 8 why don't you buy
revision 1 offer sb sth 2 be qualified to do 3 sb
sb,sth是什么?
to do通常要是请求做某事,但没有ask sb, doing sth这种用法.