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
How much did you estimate this job is going to cost us?
你估计这工作要花我们多少钱？
The highest art is to conceal art.
最高的艺术就是不露艺术。
I bound the base of the tree with sticky tape, making it impossible for the ants to reach the aphids.
我用一条胶带把桃树底部包上，不让蚂蚁接近蚜虫。