It's a waste of time trying to reason with such a silly fellow.这句话中为什么有2个动词is和reason?

问题描述:

It's a waste of time trying to reason with such a silly fellow.这句话中为什么有2个动词is和reason?

trying to reason with such a silly fellow是现在分词短语充当adj,修饰It is a waste of time,to reason with such a silly fellow是不定式,并非是一个句子