look up的三单形式是：looks up
look up
仰望；查阅；尊敬；拜访；改善
双语例句：
Many people have to look up the meaning of this word in the dictionary.
很多人要查阅字典才能知道这个词的意思。
Users will be able to use their handhelds to look up timetables on the net, search for a local hotel, and check their bank accounts.用户将能够使用掌上装置查阅网上时刻表，搜索当地旅馆并核对他们的银行账户。
You can look up people around you.你可以拜访你周围的人。
是looks up，looj是动词，三单形式是looks
