高校问答冒险岛2法师和骑士:问一道英语题目，及其语法
来源：百度文库 编辑：高校问答 时间：2024/05/12 05:43:34
请教此题的答案及其所涉及的语法知识
______(see) someone who refused to back down,they turned and ran away.
______(see) someone who refused to back down,they turned and ran away.
Having seen, 分词作状语
Having seen ------- 现在分词完成式作原因状语
Having seen完成式作状语