look look down 还有look on?和look forward to?

look back
回头看；(on)回顾,回忆
look down on
看不起,轻视
look down on
vt。俯视(看不起,蔑视,低落)
look on
观看,旁观
look forward to [ˌluk ˈfɔ:wəd tu:]
盼望,期待
look forward to
vt。展望(期待)