You seem to be having some problems.中为什么用having而不用have?
问题描述：
You seem to be having some problems.中为什么用having而不用have?
答
seem to be having和seem to have的区别在于
be having这个要件强调的是正在经受什么。。。句中是 正在经受什么困难
seem to have是一个很普通的表达，不强调现在正在进行的状态，也是经受什么困难的意思
另外to be doing也是一个句式，从语法角度来讲，表达的就是侧重于正在进行的状态。
答
Be doing 嘛，表现在正在进行的状态
答
口语中常用进行时结构,强调进行中,再如：
I shall be waiting for you at the gate at two.
I've been learning English for more than nine years.