Copular
a. 连接的, 系词的
🗣️ 情景例句
when the dog scratched on the front door.
当那狗在抓前门时。
Where the sun enterd, the doctor does not.
阳光照耀处，医生就不需。
On another occasion, he invited a number of important critics to see his private collection of modern paintings.
还有一次，他邀请一些著名评论家来参观他私人收藏的现代画。