"It was a small book explaining how to cut the death rate..."中explaining是动名词作后置定语吗?

问题描述:

"It was a small book explaining how to cut the death rate..."中explaining是动名词作后置定语吗?

楼上的错了,explaining是现在分词作后置定语,改成定语从句为 ,which explained how...是主动语态.