Copular
a. 連接的, 系詞的
??? 情景例句
in the past few weeks.
在最近幾個星期。
Don't forget to put stamps on the letter.
不要忘記在信封上貼郵票。
On motorways you can, at least, travel fairly safely at high speeds,
在公路上還好，你至少能以相當快的速度安全地向前行。