试题题干
Translate the following sentence into Chinese.
He used to come in before I sat down, when all was ready, and climb up on the pole which supported the roof.
参考答案
试题解析
考点：used to过去常常；when all was ready当一切准备就绪；climb up爬上；pole柱子；support the roof支撑房顶。
句子结构：主语为He，谓语动作为used to come in和climb up。before I sat down和when all was ready为时间状语，which supported the roof为定语从句。