be known as 意為“作為……而著名”,為人所知，其後的名詞表示一個人的身份、職業等。如：
He is known as a singer．他以作為一個歌手而出名。
We’re sure you’ll be well-known as an artist．我們相信你會成為一位著名的畫家。
We're sure you'll be famous as an artist.
be known for N/V-ing意為“因……(特色)聞名”，其後所接內容表示某人或物的特點、特長等。如：
Mt. Ali is known for its beautiful sunrise．阿里山以日出而聞名。
Mt.Ali is famous for its beautiful sunrise.
Mt.Ali is noted for its beautiful sunrise.
be known to 以...被認識 “為……所瞭解／知道”，其後接表示人的詞語。
He is known to all in our village．村子裡的人都瞭解他。
He was known to have invented many things．
＝It was known that he had invented many things．人們都知道他已經發明瞭很多東西。
be known in 意為“在某地很著名”。如：
He is well-known in the town where he was born．他在自己出生的那個鎮子上很出名
be known by 從..區別/辨識
A bird is known by its note , and a man by his talk
A man is known by the company he keeps
be notorious for/as 因...(特質;身分)而惡名昭彰
be infamous for/as
The man was notorious for bullying people into doing things for him.
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