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　　know (knew, known)知道；懂得

　　know + wh- to do sth:

　　I don’t know how to increase my reading speed.

　　我不知道如何提高阅读速度。

　　it is known + that 从句：

　　It is well known that smoking is harmful to people’s health.

　　众所周知，吸烟有害健康。

　　● be known as 以……而出名；被称作；被认为 (be famous as)

　　● be known for 因……而闻名 (be famous for)

　　● be known to 为……所熟知

　　● know about 了解

　　● know of 知道；听说

　　编辑推荐：

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