the most they would do to show their good faith is to wave their registration card to the waiter.
问题描述：
the most they would do to show their good faith is to wave their registration card to the waiter.
是不是,大多数他们会做的是展示他们的信任,挥动登记卡给服务员看.这里的主要句子结构是什么呢?is 前面那一长串真正的主语是什么呢?
答
这里是个隐藏主语.先恢复成完整的、符合正规语法的句子：The thing they would do the most to show their good faith is to wave their registration card to the waiter.所以这句话就是省略了主语the thing,把状语...