i want to give you several hangy tips for buying computer 中为什么 buying要用ing形式?

i want to give you several hangy tips for buying computer 中为什么 buying要用ing形式?
i want to give you several hangy tips for buying computer 中为什么 buying要用ing形式?

i want to give you several hangy tips for buying computer 中为什么 buying要用ing形式?
buying computer 做 介词 for 的宾语,需要用名词形式,所以动词要变成动名词.

buy是动词
buying computer 是现在分词作动名词