Copulas
n. 系动词（如be,seem,appear等）, （命题主词与谓词间的）连系( copula的复数形式 )
🗣️ 情景例句
That's what I thought.
我也正这样想。
He is unfortunate who cannot bear misfortune.
不能承受不幸的就是不幸。
whether or not they wholly alienate landowners and those who live in the countryside.
他们是否弄得土地的主人和乡间的居民同他们反目。