请问主语是什么,为什么?分析句子成分

问题描述:

请问主语是什么,为什么?分析句子成分
How well you can control your body movement in the air is a decisive factor if you want to be a really good skateboarder.

How well you can control your body movement in the air是主语这是一句主语从句a decisive factor是表语(即主语补足语)if you want to be a really good skateboarder是条件状语从句从句本身一般是一句完整的句...