He has never been concened about what other people think of him.其中about有什么作用如果去掉about句子要怎么改动才会保持原来的意思

问题描述:

He has never been concened about what other people think of him.
其中about有什么作用
如果去掉about句子要怎么改动才会保持原来的意思

关于的意思.对前面的concened作出解释,去掉不改变原意