非谓语being done 和done问题

题：Being left alone at home made the boy really annoyed.

疑问：为何不需要Left 而用Being left ?

doing 为动名词主动形式

being done为动名词被动形式

备注：动名词是非谓语动词可以作句子：主语，宾语，表语，同位语，定语，补语

He is left alone at home

分析：is left为谓语动词，只能作句子谓语成分

He doesnt like being left alone at home

分析：being left alone at home为非谓语动词（动名词短语）作句子宾语成分

Being left alone at home made the boy annoyed

分析：being left alone at home为非谓语动词（动名词短语）作句子主语成分

备注：

being left alone at home为动名词短语，可以作句子主语，宾语，表语等成分

left alone at home为过去分词短语，只能作句子状语，定语等成分，不可以作句子主语成分，所以不可以去掉“being”