高中英语语法知识点：虚拟语气

1. 掌握虚拟语气的基本用法；2. 掌握含蓄虚拟条件句的用法；3. 掌握主从句时间不一致的虚拟条件句的用法；4. 掌握名词性从句中的虚拟语气的用法；5. 掌握 wish/if only/would rather 从句中的虚拟语气的用法。考向一 if 条件句中的虚拟语气☞If I were you，I would take an umbrella.如果我是你，我会带把伞。☞We would have called a taxi yesterday if Harold hadn’t offered us a ride home.如果昨天哈罗德没送我们回家，我们会打出租车回家的。【巧学妙记】考向二 错综时间条件句的虚拟语气 当条件状语从句表示的行为和主句表示的行为所发生的时间不一致时，被称为＂错综时间条件句＂，动词的形式要根据它所表示的时间做出相应的调整。☞If you had followed the doctor’s advice，you would be better now.如果你当时听医生建议的话，你现在就好多了。考向三 省略 if 的倒装句在条件句中可省略 if，把 were，had，should 提到句首，变为倒装句式。☞If I were at school again, I would study harder.→Were I at school again, I would study harder.如果我重回学校，我会更加努力学习。☞If you had come earlier, you would catch the bus.→ Had you come earlier, you would catch the bus.要是你来的再早点，你可能就赶上公交了。☞If it should rain tomorrow, we would not go climbing.→ Should it rain tomorrow, we would not go climbing.要是明天下雨，我们就不去爬山了。考向四 含蓄条件句中的虚拟语气有时候，虚拟条件不是通过 if 引导的条件句来表示，而是暗含在上下文中。（1）用 but for 、without(如果没有）等来代替条件从句。☞Without electricity human life would be quite different.=If there were no electricity, human life would be quite different.如果没有电，人类的生活将会有很大不同。（2）用 otherwise、or(or else)、even though 等表示与上文的情况相反，从而引出虚拟语气。☞I lost your address. Otherwise, I would have visited you long before.=I lost your address. If I hadn’t lost your address, I would have visited you long before. 你的地址我弄丢了，要不我早就去拜访你了。（3）虚拟条件通过 but 暗示出...