it was the oldest car taking part 这里taking是现在分词吗?

it was the oldest car taking part 这里taking是现在分词吗?
it was the oldest car taking part 为什么这里的tak要加ing形式呢 如果是现在分词的形式 那前面不是应该加BE动词吗?还有一句 a search party went into the cave hoping to find buried treasure.这里的hoping前面也没BE动词 为什么呢

it was the oldest car taking part 为什么这里的tak要加ing形式呢 如果是现在分词的形式 那前面不是应该加BE动词吗? 还有一句 a search party went into the cave hoping to find buried treasure. 这里的hoping前面也没BE动词 为什么呢解析如下：（1）taking part 是非谓语动词中的一种（现在分词作后置定于用来修饰car 可以改为一个定于从句It was the oldest car that is taking part...)(2)hoping to find buried treasure是非谓语动词中的一种（现在分词作状语的一种语法,其逻辑主语就是主句主语,是它发出来的,主动就用doing被动就用done形式希望以上能明白,并采纳,谢谢!