put up这里是vt.张贴，举起，建造，提高。put sth. up和put up sth.补充：sth为代词时必须放在中间，若sth.为名词，则均可。

【例句】
I put a flyer on the bulletin/ˈbʊlɪtn/ board.
我曾在公告牌上贴了张传单。

He was putting up a new fence at his home.
他正在为自己家搭建新的篱笆墙。