just as beekeepers with their bees 如何分析

请教曹老师：

The river which forms the eastern boundary of our farm has always played an important part in our lives. Without it we could not make a living.

There is only enough spring water to supply the needs of the houses, so we have to pump from the river for farm use. We tell river all our secrets.

We know instinctively, just as beekeepers with their bees, that misfortune might overtake us if the important events of our lives were not related to it.

老师您好！

这一句We know instinctively, just as beekeepers with their bees, that misfortune might overtake us if the important events of our lives were not related to it.

书上说just as beekeepers with their bees 是非限制性定语从句，省略谓语动词know，新东方辅导书说这是方式状语从句，省略了谓语动词do

我感觉应该是“非限制性定语从句，而且省略谓语动词know=do”.

特意请教曹老师批评指正，麻烦分析一下。

谢谢！