句子原文：
“Since our chief business with them is to enable them to share in a common life we cannot help considering whether or not we are forming the powers which will secure this ability.”
第一步：拆主干，抓核心
主句找主谓宾：we cannot help considering whether or not we are forming the powers。
第二步：切分从句和修饰
1. “Since our chief business with them is to enable them to share in a common life”
2. “whether or not we are forming the powers which will secure this ability”
第三步：理清指代和逻辑
第四步：整句顺译
“因为我们和他们打交道的主要目的是让他们参与共同生活，所以我们不得不考虑：我们是否在培养足以确保这种能力的力量。”
第五步：考点总结
下次碰到类似结构，直接套这个流程：砍枝干（从句）、留主干、对号入座。