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在英语语法中,虚拟语气常常用于表达假设、假想、愿望等虚拟情况,if三大虚拟语气公式是我们在学习虚拟语气时必须掌握的重要内容。
第一种虚拟语气公式:If + 主语 + 动词过去式,主语 + would/could/might + 动词原形
这种虚拟语气公式表示的是对于将来或现在的假设情况,如:
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If I had more time, I would travel around the world. 如果我有更多时间,我会环游世界。
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If it rained tomorrow, I might stay at home. 如果明天下雨,我可能会呆在家里。
第二种虚拟语气公式:If + 主语 + had + 过去分词,主语 + would/could/might + have + 过去分词
这种虚拟语气公式表示的是对于过去的假设情况,如:
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If I had studied harder, I would have passed the exam. 如果我学习更刻苦,我就能通过考试了。
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If I had known you were coming, I would have prepared dinner for you. 如果我知道你要来,我就会给你准备晚餐。
第三种虚拟语气公式:If + had + 主语 + 过去分词,主语 + would/could/might + have + 过去分词
这种虚拟语气公式表示的是对于过去的假设情况,如:
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If I had not missed the train, I would have arrived on time. 如果我没有错过火车,我就能准时到达。
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If I had taken the job offer, I might have been promoted by now. 如果我接受了那份工作,我现在可能已经升职了。
以上就是if三大虚拟语气公式的详细介绍,希望对大家学习英语语法有所帮助。