Theprofessor(refer)toatthemeetingisfromBeijinguniversity填什么为什么过去时为什么后面是isfrom不是wasfrom

Question

The professor _____________(refer) to at the meeting is from Beijing university 填什么 为什么
过去时 为什么后面是 is from 不是was from

Answer 1

referred
会上提到的那个教授是北大的.
The professor referred to at the meeting =The professor whom was be referred to at the meeting
这里过去分词 referred表达了被动的概念