look down at sb 和look down on sb的区别?怎么用?

look down at sb 和look down on sb的区别?怎么用? put sb down 和look down on sb的区别 look down on和look down at的区别? look in sb和look on sb和look at sb 有什么区别?我怎么只知道有at look down upon和look down on的区别~ look down for/on sb 有这样的搭配吗? look down;look at;look down at;look down on区别? 轻视某人是look down sb还是look down at sb? look down to和look down on有什么区别? 请问有look down at sb 这个短语吗, “打量某人”可以用look sb up and down吗? get sb down和let sb down有什么区别