Question

谁能帮我分析一下下面的英语句子，谢谢

It was luck again, according to Nina, that brought her the role in Mute Wife for which she is best konwn.
我想问一下上面句子中的that是做什么成分的，it不可能做的是名词从句，因为that在名词性从句中不充当成分，也不像定语从句，因为that之前没有先行词，所以我真的不知道that做的是什么成分了，希望高手能帮忙解答一下啊

Answer 1

楼主先无视掉插入语 according to nina,和again
变成 it was luck that brought her the roll........
显然 定语从句, that 做从句的形式主语,真正的主语是luck

Answer 2

it形式主语
was luck again系表
according to Nina 状语或理解为插入语
that brought her the role in Mute Wife for which she is best konwn.
真正的主语

Answer 3

定语从句的引导词