Complementizer
n. [語](引導補語分句的) 補語化成分
??? 情景例句
This is meant to happen.
這件事注定要發生。
But it's still raining today!
可今天還在下雨。
It is hard for us to realize nowadays how difficult it was for the pioneers.
我們今天很難想像昔日的登山先驅們是多么艱苦。