if引导虚拟条件句的用法
虚拟语气if的三种用法如下：
表示与现在事实相反的情况、表示与过去事实相反的情况、表示与将来事实相反。
表示与现在事实相反的情况：
1、从句：If+主语+动词一般过去时(Be动词用were)。
2、主句：主语+ should/would/might/could+do。
3、例句：If I were you，I would take an umbrella。
表示与过去事实相反的情况：
1、从句：If+主语+had+done。
2、主句：主语+should/would/might/could+have done。
3、例句：If he had taken my advice，he would not have made such a mistake。
表示与将来事实相反：
1、从句：if+主语+were to do。
2、if+主语+should+do。
3、if+主语+动词一般过去式（be动词用were）。
4、例句：
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绛旓細if sb do sth.he said if rain was stop.鐢if寮曞鐨勬潯浠鐘惰浠庡彞锛屾椂鎬佸簲璇ユ槸涓诲皢浠庣幇锛屽氨鏄涓诲彞鐢ㄤ竴鑸皢鏉ユ椂锛岃屼粠鍙ョ敤涓鑸幇鍦ㄦ椂琛ㄧず灏嗘潵銆備緥濡 if it doesn't rain tomorrow,i will visit my former school.杩欓噷浠庡彞灏辩敤涓鑸幇鍦ㄦ椂銆傚綋鐒秈f寮曞鐨勪粠鍙ヤ篃鍙互鐢铏氭嫙璇皵 渚嬪if i got up ear...
