《2013年九年级英语全册 Unit 4 What would you do要点详解 人教新目标版.docVIP

2013年九年级英语全册 Unit 4 What would you do要点详解 人教新目标版 Section A 1. 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 bus.( 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基本形式。 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. 假如我是你的话，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. 假如有人请我当电影演员，我会表示拒绝。(事实上现在没有人请我当电影演员) If I knew his telephone number, I would tell you. 如果我知道他的电话号码，我就会告诉你。（事实：不知道） If there were no air or water, there would be no living things on the earth. 如果没有水和空气，地球上就不会有生物。(事实：地球上既有空气也有水) ②与过去事实相反 If he had not hurt his leg, John would have won the race. 如果约翰的腿之前没受伤，那么赢得比赛的就会是他。（实际情况：约翰的腿受伤了。） If I had been invited, I would have come to the party. 如果邀请我的话，我就会参加晚会。（实际情况：当时没人邀请我，我也没去。） If I had got there earlier, I should/could have met her. 如果我早到那儿，我就会见到她。（事实：去晚了） If he had taken my advice, he would not have made such a mistake. 如果他听我的劝告的话，就不会犯这样的错误了。（事实：没有听我的话） ③与将来事实相反或表示对将来情况的主观推测（可能相反或可能性很小） If it were to / should rain tomorrow, I would stay in bed all day long. 如果明天下雨，我就睡一整天。（实际情况：明天不太可能下雨，我也不太可能睡一整天。） If he would come here tomorrow, I should/would talk to him. 如果他哪天来这儿的话，我就跟他谈谈。（事实：来的可能性很小） If there were a heavy snow next Sunday, we would not go skating. 如果下周日下大雪，我们就不能去滑冰了，（事实：不知能否下雪） If you succeeded, everything would be all right.