请问英语中从句是不是必须要有谓语动词

问题描述:

请问英语中从句是不是必须要有谓语动词
eg: an education campaign should be launched to popularize the importance of environmental protection among the general public,especially the young , (how to understand the relationship between human beings and our environment .)这句是不是做public 的宾语,怎么没谓语动词

原文带括号还是你自己把 HOW TO...括起来的?括号后面是不是还有其他内容?