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问题: Do you know of any differences between the lives o

Do you know of any differences between the lives of Chinese and British high school students?
这句句子中的of是什么成分?为什么要添上of,能不能去掉呢?

解答:

know of 比know程度轻。know of有时也可以说成know about。

know of是个词组,是“知道有,听说过”的意思

know意为“知道;认识;明白”,为及物动词,通常指直接知道或了解某人(某物)。
She knows what to do.
We have known each other since young。

know about意为“了解;知道……的情况”,通常指间接了解某人或某物。如:
Many students want to know about the differences between American English and British English.许多学生想知道美国式英语和英国式英语之间的区别。

know of意为“听说(关于……的事情);知道”,通常指间接地听说某人或某物。如:
I don't know the writer, but I know of her.我不认识这个作者,但我听说过她。