Question

一道老SAT语法题

Among the Inuit peoples of arctic Canada, poetry contests are held to settle conflicts (that might otherwise be disruptive to families and communities).
括号里面的话为什么不能替换成 by which families and communities were otherwise being disrupted?

Answer 1

应该是因为语意被改变。

原从句中有 might otherwise be 主要谓语，表“不然(否则)的话，很可能………”的逻辑;
更改后，主要谓语为“were being”是进行时，表“正在被……”

故改动前后逻辑相差很大，不能互换。