内容正文:
Unit 1 Art
Section Ⅲ Grammar
虚拟语气(Ⅰ)
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if
过去
would have been
without
现在
动词原形
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语
法
精
要
点
拨
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were
were
had known
would have
visited
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telephoned
Were
had worked
would have
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语
法
应
用
落
实
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were
Were
would have finished
would be
had taken
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would have missed
would have met
had told
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had
Had
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Thank you for watching !
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语 境 自 主 领 悟
先观察原句
1.If the rules of perspective 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.
3.There are scores of modern art styles,but without the Impressionists,many of these painting styles might not exist.
语 境 自 主 领 悟
后自主感悟
1.例句1中的 引导的虚拟条件句中谓语动词had not been discovered为过去完成式,表示与 事实相反,主句的谓语动词 为would +have +过去分词。
2.例句2和例句3中的介词 构成的介词短语表示假设的条件,为含蓄虚拟语气,两者都是表示与 事实相反,主句的谓语动词要用would/should/might/could+ 。
一、动词的语气
语气是动词的一种形式,表示说话人对某一行为或事情的看法或态度。英语中的动词在句中有三种不同的语气:陈述语气、祈使语气和虚拟语气。
1.陈述语气
表示动作或状态是现实的、确定的或符合事实的,用于陈述句、疑问句和某些感叹句。
There are two sides to every question.
每个问题都有两面性。
2.祈使语气
表示说话人对对方的请求或命令。
Please lend me your dictionary.
请把你的字典借给我用一下。
3.虚拟语气
用来表示所说的不是事实,或者是不可能发生的情况,而是一种假设、愿望或建议等。虚拟语气通过谓语动词的特殊形式来表示。
If I were a bird,I could fly in the air.
如果我是一只小鸟,我就能在空中飞行。
二、虚拟条件句的谓语形式
假设情况
if条件从句的谓语形式
主句的谓语形式
与过去事实相反
过去完成式(had+过去分词)
would/should/might/could+ have +过去分词
与现在事实相反
过去式(be的过去式常用were)
would/should/might/could+动词原形
与将来事实相反