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
A little further back, Tom.
再往后一点 Tom。
Do you think the doctor could see me tomorrow before 9:30?
你看医生在明天9:30前能给我看病吗？
He ran his horse up the hill.
他策马跑上小山。