Record numbers of Americans are in danger of losing their homes
问题描述：
Record numbers of Americans are in danger of losing their homes
请帮忙分析一下句子成份
答
Record numbers of Americans are in danger of losing their homes.
这是个主系表结构的句子.
主语：Americans
定语：record numbers of
系动词：are
表语：in danger
定语：of losing their homes