how是疑问副词，后常常形容词副词动词等方面的词,
what是疑问代词，后常常接名词代词等方面
例子1.
I
am
going
swimming
this
afternoon.
What
about
you
(you是代词)?
你有什么打算？
2.
My
father
haven't
seen
Jack
for
quite
a
long
time.
How
about
him(him也是代词)?
他近来怎么样？
满意请采纳，谢谢
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