know
A. vt.
(1)知道
I have known him since childhood.
(2)懂得
Do you know Japanese?
B.习语
be known as…通称为；以著称；被认为是
be known for…因而出名
be known to sb.为某人所了解
become well known出名
for all/anything/ everything I know 据我所知
It is well known that…众所周知
know about/ of了解；知道
know…for certain确实知道
know sb. by name仅知道某人的名字（不认识）
know sb. by sight与某人面熟（不熟悉）
know/learn …by heart背诵
make…known/public公告；发表；表示
know/ tell right from wrong辨别是非
know no limits是无限的
A man’s life is limited, but service to the people knows no limits.
