Ⅰ. base on “以……为根据”，如：
① Edison based his ideas on scientific experiment. 爱迪生的想法是建立在科学实验的基础上的。
② You should base your opinion on facts. 你的意见都要以事实为根据。
Ⅱ. be based on “以……为根据”; “根据……”;“基于……”
① What he said is based on fact. 他所说的话是以事实为根据的。
② The story is based on real life. 那故事是根据现实生活而写的。
③ Some modern languages are based on Latin. 在些现代语言是以拉丁文为基础的。