Preformative
a. 使预先形成的, 前缀的
🗣️ 情景例句
There is still a week to go before the vacation begins.
现在距离假期还有一星期。
What do you do in your spare time?
空闲时间你干什么？
That's what we did in China in the old days, before thermoses were invented, said Wei Hua.
“那是我们中国从前未发明出热水瓶时的做法。”魏华说。