Complementizer
n. [语](引导补语分句的) 补语化成分
🗣️ 情景例句
Mm, I'm in a hurry too.
哦，我也有点儿急事要办。
There's nothing to do because tomorrow is a holliday.
无所谓因为明天是假期。
Now move the hand to and fro and around but not up and down.
然后把手前后左右以及旋转摆动，但不要上下摆动。