主句: you can see

宾从:it(形主) + would be(谓动) to our advantage(表语)+ (真主) to do the simple things +(定从)that work+(时状从) when things change.

“that work”是定语从句,修饰 things .

句意: 你能发现, 当情况发生变化时, 做那些起作用的简单事情总是对我们有利.

to one's advantage对某人有利