if 引导的非真实性条件状语从句即虚拟语气通过动词形式的变化来表示说话人对发生的动作或存在的状态 所持的态度或看法的动词形式称为语气..英语中的语气分三种： 陈述语气、祈使语气、虚拟语气.虚拟语气表示说话人所说的话 不是事实,而是一种祝愿,建议,与事实相反的假设或实际可能 性不大的情况等〔即非真实的假设〕.If 引导的条件状语从句分为真实和非真实条件句〔虚拟条件句〕. 真实条件句表示在假设的条件下,有可能实现的情况.非真实条 件句表示的是假设的或实际可能性不大的情况,故采用虚拟语 气.If he doesn’t hurry up, he will miss the 真实条件状语〕If he was free, he asked me to tell stories.〔真实条件状语〕If I were you, I would go at once.〔非真实条件状语从句〕If there was no air, people would die.〔非真实条件状语从句〕1〕非真实条件句中虚拟语气的根本形式.假设类型 条件从句的动词 结果主句的动词与 现 在 事 实 相 反 动 词 过 去 式 〔 be 只 用 were 〕 would/should/could/might + 动词原形与过去事实相反 had+过去分词 would/should/could/might + have +过去分词与 将 来 事 实 相 反 动 词 过 去 式 / 〔 should/were to 〕 + 动 词 原 形 would/should/could/might + 动词原形① 与现在事实相反If I had time, I would go for a walk.如果我有时间,我就会去散步.〔实际情况：我现在没有时间,也不会去散步.〕If I were you, I would take an umbrella.假设我是你的话,我会带上雨伞.〔事实上我不可能是你.〕I would say no if someone asked me to be in a movie.假设有人请我当电影演员,我会表示拒绝.〔事实上现虚拟语气 专项练习1 . Were it not for the snowy weather, we all right.A. would be B. would have been C. were D. may be2 .more careful, his ship would not have sunk.A. If the captain were B. Had the captain beenC. Should the captain be D. If the captain would have been3. If he me tomorrow, I would let him know.A. should call B. should not have been ableC. were not able D. are not able4. If you asked your father, you permission.A. may get...
