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
taking a vacation together--with the family.
要一起渡个假， 全家一起。
Nothing so bad, as not to be good for something.
塞翁失马，安知非福。
He is used to eating out all the time.
他已经习惯在外面吃饭了。