句子成分分析

更新时间2022-03-01 11:21:02

we are so familiar with the fact that man ages,that people have for years assumed that the process of losing vigour with time,of becoming more likely to die the older we get,was something self—evident,like the cooling of a hot kettle,or the wearing-out of a pair of shoes中的was引导了什么句子成分？

这是个主系表结构，was引导的是表语。