refer用法the professor (who is referred to) came yesterday后面没宾语时就用refer,不要to啊,为什么这里有TO?句子中有宾语吗？是哪个？主语呢？
网友回答
refer作为“论及,谈到,提及”这个意思讲时,是不及物动词,没有被动语态,只有构成“refer to”这个动词短语时才具有及物性,才有被动语态.
所以to不可缺省.
补充：句子the professor (who is referred to) came yesterday是个主谓（状）结构,没有宾语,the professor who is referred to 是个名词短语作主语,who is referred to是个后置定语修饰 the professor,came是谓语,yesterday做时间状语.
要是名词短语有什么不明白的,可以参见我的空间