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
Let sleeping dogs lie.
别招惹麻烦。
Our new car looks like a dream next to her old car.
跟旁边这些车比较，我们的新车如同一个梦。
The more you exercise, the fitter you will be.
越运动，越健美。