关于何时加that?

来源：百度知道 编辑：UC知道 时间：2024/05/26 14:56:08
To support the conclusion, the arguer cites the evidence that parents are now more worried about youthful violence and are concerned about better education.
第二个that要加吗？就是and 后面要加that吗？。。或者解释下，什么时候，and 后的that必定要加的？

that在这里引导同位语从句“parents are now more worried about youthful violence and are concerned about better education”，从句中and连接的是两个主语相同的主系表结构，省略的是主语parents，所以and前后部分都是同位语从句的组成部分，不需要加that。
如果and之后是另一个从句的话，就需要加that了