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
As you please. I'm ready.
请便。我准备好了。
This year I'm in a co-ed dorm.
今年我住在男女生合住的宿舍。
I only decided to get one today.
我只是今天才决定买的。