英语语法问题-请从语法成分和时态方面帮我解析下这句话Hehadhadalonganduncomfortabletrip,forhehadbeenconfinedtothewoodenboxforovereighteenhours.请问这里的for是个什么用法?

Question

英语语法问题-请从语法成分和时态方面帮我解析下这句话
He had had a long and uncomfortable trip,for he had been confined to the wooden box for over eighteen hours.
请问这里的for是个什么用法?

Answer 1

这里的for起连接副词的作用,引导原因状语【 for he had been confined to the wooden box for over eighteen hours. 】
主句的时态为过去完成时,从句为被动态的过去完成时.