what most parents are concerned about is to give their children the best possible education.
问题描述：
what most parents are concerned about is to give their children the best possible education.
不要what行不行
答
不行.what引导主语从句,如果没有,句子里就有了are和is两个谓语动词,不合语法.我是看百度在线翻译里面翻译出来的没有what。那如果改成most parents concern aboutis to give their children the best possible education ，没有两个谓语动词呢？那concern和is又成了两个谓语动词。在英语里，主句只能有一套谓语动词（一个或者并列关系的一组）。