Grammaticalization
语法化
🗣️ 情景例句
I'd like you to meet Audrey and her mother, Mrs. Cooper.
我来向你介绍， Audrey和她母亲 Cooper太太。
He has been working in advertising for ten years, but now he is teaching.
他曾经在广告公司服务十年，但现在在当老师。
Yes, I can.
是的。