I don't think it is necessary for you to attach great importance to ()to college.为什么要用going呢?

问题描述:

I don't think it is necessary for you to attach great importance to ()to college.
为什么要用going呢?

go to college 去大学
前面是介词,用going

attach sth to sth,把。。。联系上。。。或者说,认为。。。怎么样。~
sth是名词,going 变成动名词结构,才符合语法。

这里的to相当与介词.
介词+动词ing