Question

请教一个分析句子成分的问题

As it turned out, my little publication went on to become Student, a national magazine for young people in the U.K. 请问As it turned out在句中做什么成分，it指代什么

Answer 1

1. As it turned out在句中为非限制性定语从句。
其中It为形式主语，指代as所指代的成分。
而非限制性定语从句中的关系代词as，就是代指后面的主句my little publication went on to become Student...
再如：As we all know, the earth goes around the sun.
as代指的也就是主句the earth goes around the sun.

2. 楼主应该知道这样的一个固定句型：It turn out that从句，意思是“结果是/证明是/原来是...”就是此类用法。
如：It turned out that he was never there.
原来他根本没去过那儿。
It turned out that our calculations were incorrect.
结果证明我们的计算是错误的。

追问

不好意思，我还是没太明白。我觉得as it turned out,...好像和As we all know不太一样啊，如像你分析的那样，那句中的it就是多余的了，因为as和it指代同样的句子。

追答

as it turned out
= it turned out (as)
= it turned out (that my little publication went on to become Student, a national magazine for young people in the U.K.)

没错，it作为形式主语，代替就是真正的主语（从句）：that my little publication went on to become Student, a national magazine for young people in the U.K.