英语主语从句的一个疑问我在语法书里看到主语从句上面说：“相当于名词,在复合句中做主句的主语.在多数情况下用it作形式主语,而把主语从句放在主句之后.“然后有一个例句：”That the earth goes round the sun is know to us all.（= It is known to us all that the earth goes round the sun.)“我的问题是: “It is known to us all ”后面还可以跟名词吗?否则为什么后面可以带一个相当于名词的从句“that the earth goes round the sun”呢?
英语主语从句的一个疑问
我在语法书里看到主语从句上面说：“相当于名词,在复合句中做主句的主语.在多数情况下用it作形式主语,而把主语从句放在主句之后.“然后有一个例句：”That the earth goes round the sun is know to us all.（= It is known to us all that the earth goes round the sun.)“
我的问题是: “It is known to us all ”后面还可以跟名词吗?否则为什么后面可以带一个相当于名词的从句“that the earth goes round the sun”呢?
如果你想接名词，为什么不直接放前面呢？for instance,newton is known us all as a renowned scientist,当然你可以说it is known to us all that newton is a renowned scientist,但当你的主语很长的时候最好用it做形式主语，像你举的例子就是这样的
It is known to us all that the earth goes round the sun
这是句强调句
it是形式主语，真正的主语是the earth goes round the sun
主语是强调部分，结构是it is....that
既然有语法书就看看it用法强调句式
that the earth goes round the sun 是真正的主语,
“It is known to us all ”里面的it是形式主语,可以理解为真正主语的“快捷方式”.