Having been served lunch
现在分词(的完成时、被动语态)作伴随性方式状语
the committee members discussed the problem 是主干句
the committee members 主语
discussed 谓语(一般过去时)
the problem 宾语
Having been served lunch
现在分词(的完成时、被动语态)作伴随性方式状语
the committee members discussed the problem 是主干句
the committee members 主语
discussed 谓语(一般过去时)
the problem 宾语