Complementizer
n. [语](引导补语分句的) 补语化成分
🗣️ 情景例句
But the only time he's available this week
但这星期他有空的时间只有
How many pieces are you going to buy?
你要买几个？
I thought you wanted to visit your friends.
我原以为你要去拜访朋友。