It goes without saying that从句

It goes without saying that if someone has lung problems they should not smoke.

请问老师It goes without saying that的that是什么从句？it是形式主语吗？

It goes without saying that 从句

解答：以上句子结构可以根据“习语”进行理解，其意思为“不言而喻”，其语法结构：it为形式主语，goes为不及物动词，等于“can be understood”,without saying为介词短语作谓语动词“goes”的方法状语。that从句为句子真正主语。

It 【形式主语】//goes 【谓语动词】//without saying【方法状语】// that 从句【真正主语】

类似以上句子结构例句如下 供网友参考

It goes without saying that health is above wealth.  健康胜于财富这是不言而喻的。

It goes without saying that he is a very sincere person.  他是一位很诚实的人这是不言而喻的。

It goes without saying that money can not buy anything.  资金没办法买到所有这是不言而喻的。