as with结构应该怎么样理解

The correct method of holding the weapon was as with a rifle.

这个句子中，as with结构应该怎么样理解？

1、as 作为从属连词引导状语从句，省略了部分结构

2、as with作为一个介词

@teacherliu@语法探讨

两位老师好，能帮助学生解答一下吗？万分感谢！

as with在此是复合介词，意为”与...一样“，介词短语作表语。

The correct method of holding the weapon was as with a rifle.

手持这种武器的正确办法和手持步枪是一样的。

也可以觉得as引导比较分句作表语，从句省略了句子成分。分句可以补全如下：

The correct method of holding the weapon was as one deals with a rifle.