求大牛帮分析语法：Asthepreciouslegacyhandeddownbyancestors,alanguageisthekeytothestudyandpreservationofaculture.As因为还是随着?前后主语不一致?

Question

求大牛帮分析语法：As the precious legacy handed down by ancestors,a language is the key to the study and preservation of a culture.
As 因为还是随着?
前后主语不一致?

Answer 1

As the precious legacy（作为宝贵的遗产,As引导的主语补足语） handed down by ancestors（过去分词短语作定语,修饰legacy）,a language（主语） is the key to the study and preservation of a culture....