帮忙分析一下下面这个句子的语法

Question

Participants in this enterprise were supplied with bicycles,which they used to deliver parcels and messages,and wich they were required to pay for gradually from their wages. 这里的which 应该就是定语从句的先行词了,但是在从句中做什么成分呢? 宾语的话也有点别扭啊?

Answer 1

bicycles 才是先行词，which是 连接代词。 代指 bicycles

做宾语。

还原一下正常语序就是： they used bicycles to deliver parcels and messages.

追问

那第二个从句也一样吗?还原的话就是 they were required bicycles to pay for gradually from their wages? 不觉得很怪么,还是 第二个which 代指送包裹这个事?

Answer 2

你是吧 used to 看成 情态动词词组了吧“过去常常”
这里不是，which做used（使用）的宾语，to deliver...是目的状语

第二句话，which 做pay for 的宾语（介词宾语）

Answer 3

做used 的宾语，指代bicycles,

use是及物动词，要带宾语的。