为什么是increasing?to increase可不可以?increased可不可以?

问题描述:

为什么是increasing?to increase可不可以?increased可不可以?
Whether increasing teacher's salary is the best way to improve the quality of education has been discussed.

increasing作is的主语,从句首一直到education又作为has的主语.就是说主语只能是动名词,不能使to do 或者动词的ed形式,对吗,就是不明白Whether to increase teacher's salary is the best way to improve the quality of education has been discussed这样行不行,就是把increasing换成to increase。如果是上文这样的话,whether to increase teacher's salary是主语,后面出现了两个谓语(is和has)。那么为什么increasing是对的呢,那是因为whether后面接了一个句子作为了主语,那么is就作为了whether所引导的主语从句中的动词,has才是整个句子的谓语。