to have information in your mind from learning or experience
I know the answer because I studied.
我知道答案,因为我学习过。
to understand or be aware of something
I know you are tired.
我知道你累了。
to feel sure about something
I know it will be sunny tomorrow.
我确信明天会是晴天。
to be familiar with a person or place
I know my neighbor well.
我很熟悉我的邻居。
to have learned a skill and be able to use it
I know how to swim.
我会游泳。
to be thought of as having certain qualities
She is known to be very kind.
她以非常善良而闻名。
to give a name or title to someone or something
This plant is known as 'sunflower'.
这种植物被称为'向日葵'。
to be able to recognize someone or something
I know a good book when I see one.
我看到一本好书时就能认出来。
to understand the difference between things
Children should know right from wrong.
孩子们应该知道对与错的区别。
to have seen, heard, or experienced something
He is known to arrive late.
众所周知他经常迟到。
to have personal experience of something
She knows what it is like to be hungry.
她知道饥饿是什么感觉。