先看两个例句:
1、A recent public service advertisement by a large insurance company featured not charts showing how much at risk we are,but a picture of a child's bicycle with the padlock attached to it.
2、He places regular though small advertisementss in newspapers featuring affordable second-hand cars,vans and trucks.
为什么这两个句子中,feature一个用的是V-ed分词,另一个用的是V-ing分词?feature到底如何选择非谓语形式?