The film we look forward to is interesting 为什么用is?

问题描述:

The film we look forward to is interesting 为什么用is?

The film we look forward to is interesting.
我们期盼的这部电影很有趣.
这个句子的主句部分是The film is interesting,主语是第三人称单数film,is与形容词interesting一起构成谓语.而we look forward to则是一个定语从句,相当于形容词的作用,修饰主语film.