请教这个句子的主干 they have all these trips down the rapids
问题描述：
请教这个句子的主干 they have all these trips down the rapids
They have all these trips down the rapids
这个句子的 down 来修饰什么?rapid 为什么要加s?
答
主语:they 谓动:have 宾语:all these trips 定语:down the rapids修饰 trips down 介词,沿着…向下,顺着.而下rapid 名词,"激流" .因此可加S构成复数.They have all these trips down the rapids.他们有/提供各种顺着...