Copula
n. 系词, 介体, 接合部\\n[医] 介体; (舌)联桁; 交配
✅ 同义词
📖 牛津释义
copula
n
(grammar) type of verb that connects a subject with its complement 系词（即连系动词, 用以连结主语及其补语）
In `George became ill', the verb `became' is a copula. 在Georgebecameill一句中, became是系词.
🗣️ 情景例句
I would like a room on the 5th floor.
我想在五楼要一个房间。
To make enemies, talk; to make friends, listen.
要成仇敌，多讲；要成朋友，多听。
And don't set the hillside on fire either!
“也不要把山坡弄着火了。”