He is going to make a model plane,some old parts to help.

问题描述:

He is going to make a model plane,some old parts to help.
这个是不定式与逻辑主语(名词)共同构成独立主格结构的形式,我想知道它的正常有连词的情况下是什么样的?

He is going to make a model plane,as some old parts is to help.
此句中的独立主格表将来的动作 相当于原因状语