look down on和look down at的区别?

look look down 还有look on?和look forward to? look down upon和look down on的区别~ look down to和look down on有什么区别? look down on和look down at的区别? Please do not look down on others look down on put sb down 和look down on sb的区别 帮忙找一下有关keep的短语和固定搭配再帮忙解释下面几个短语look black make a contribution to look bule as little as deserve to do look about look on look down on写出汉语意思 look down;look at;look down at;look down on区别? I look down on you I look down on you disdain look down on you look down at sb 和look down on sb的区别?怎么用? look up to和look down 问：look back,look on ,look down on ,look forward to look down look down look down