先说be familiar with 吧
I.be familiarwith （某人）对某事熟悉
例如：I'm very familar with some American films. 我对一些美国电影非常的熟悉.
2.be familiarto
= be well known to sb 为（被）某人熟知
例如：Some American films are familiar to us. 一些美国电影被我们所熟知.