know

vt.[W]

1. 知道；了解；懂得[O2][+（that）][+wh-]
   I knew she was against us.

   我知道她反对我们。

2. 认识；熟悉
   We have known each other for many years.

   我们相识多年了。

3. 认出；辨别[（+by/from）]
   I know right from wrong.

   我能辨别是非。

4. 体验，经历
   I have known hunger and hardships.

   我体验过饥饿和困苦。

5. （仅用于过去时和完成时）见到过，听到过[O2][O3]
   I have never known him to lie.

   我从没有听说过他撒谎。

6. 精通（语言等）
   He knows five languages.

   他精通五种语言。

vi.[W]

1. 知道；了解，懂得[（+about/of）]
   There is one or two things I'd like to know about.

   有一两件事我很想知道。