[原句]The other day I was showing the boys the weekly chemistry experiment when, before I knew it, the mixture was bubbling over everywhere. 有一天.我正在给孩子们做每周一次的化学实验的演示.我还没明白怎么回事.混合剂就到处冒气泡了. [模仿要点] 句子结构: when + 时间状语从句+before +时间状语从句 [模仿1]陈凯歌.电影梅兰芳的导演.正在为这部电影做大量准备的同时.甚至在它公演前.他都承受着巨大的压力. 答案:Chenkaige, director of MeiLanfang , was making quantities of preparations for the movie when, even before it was put on , he suffered from great stress. [模仿2]八月的时候我们收到了他的一封信.在此之前我们不知道他已经入伍了. 答案:It was August , before we knew he had joined the army, when we received a letter from him. 【查看更多】