课文中的句子 ? If the rules had not been discovered, no one would have been able to paint such realistic pictures. 2. Without the new paints and the new technique, we would not be able to see the many great masterpieces for which this period is famous.
语气 英语的动词一般可带有三种不同的语气： 陈述语气，祈使语气和虚拟语气。不同 的语气用动词的不同形式（有的还借助 句法形式）来表示。
表示说话人所说的话不是一个事实，而是一 种假设、猜测、怀疑等(在条件从句中或让步 状语从句中)；一是表示说话人的愿望、要求、 命令、建议等 (在宾语从句、表语从句、同位 语从句)。
虚拟条件句 与现在 事实相 反的假 设 与过去 相反的 假设 If+主语+动词的过去式 （动词be用were) 主句
主语+should,would, might,could＋动词 原形
主语＋should, would, might, could ＋have done
与将来 相反的 假设
1、If+主语+动词过去式 主语＋should, would 2、If+主语+were to+ 动词原形 3、If+主语+should +动词原形 might, could＋动词 原形
1、与现在事实相反： 主句： would / should / could / might + 动原 从句： 动词过去式（be 用 were）
If I ______ would study hard were you, I _____________
If I ______ a radio. would buy had money, I _____________
would fly in the sky. If I _______ were a bird, I ___________
I ___________ too if I ______ would go had time to spare.
If everyone ____ ____________. be saved knewfirst aid, many lives would
2、与过去事实相反： 主句： would / should / could / might + have done 从句： had done
If you ________ _____________ had come yesterday , you would have seen her.
If you _______ had got up earlier, you _______________ would have caught that bus.
would have passed If he __________ had studied harder, he __________________ the exams.
If I _________________ had remembered your telephone number, I would have phoned you. _________________
3、与将来事实可能相反： 主句： would / should / could / might + 动原
动词过去式 从句： should + 动原 were to + 动原
If it _________ would not go outing should rain tomorrow, we _________________. ( rained / were to