不可省略do
I don't know many people.
什么样的people
as many people as you know.
加了people是为了让句子完整
比较I run as fast as wind.把as...as wind去掉.I run fast.句子是完整的.但如果把people也去掉,就变成 I know many.many what?句子就不对了.
而不能去掉do是因为会引起歧义.
I don't know as many people as you.我并不认识很多像你一样的人.
I don't know as many people as you do.我并不像你一样,认识很多人.I run as fast as my brother.为什么没有do？does 省略了因为不会产生歧义. 加上does也没问题