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
Would you mind-giving me that-red-book?
能把那本红色的书递给我吗？
The weather has been hot so far this summer.
到目前为止，今夏天气一直很炎热。
You're working hard, George.
你干得真辛苦，乔治。