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必 修 4 Units 3～ 专项语法 虚拟语气 要点精析 条件从句 主句 例句 与现在事实相反 If I(we, you, he, she, it, they)＋动词过去式(be的形式一律用were) I(we, you, he, she, it, they)＋would/should/could/might＋动词原形 If he were indoors, he wouldn't feel so cold. 条件从句 主句 例句 与过去事实相反 If I(we, you, he, she, it, they)had＋过去分词 I(we, you, he, she, it, they)＋would/should/could/might＋have done If you had taken my advice, you wouldn't have failed in the examination. 条件从句 主句 例句 与将来事实相反 A式：If＋主语＋一般过去式B式：If＋主语＋were to do C式：If＋主语＋should do I(we, you, he, she, it, they)＋would/should/could/might＋动词原形 A：If he were here this evening, we would play cards.B：If she were to marry Jack, she would be happy.C：If she should know it, she would tell me. 例 (2010·天津，15)—John went to the hospital alone. —If he________me about it, I would have gone with him. A．should tell B．tells C．told D．had told 解析：句意：——约翰自己去的医院。——如果他告诉我的话，我就和他一起去了。本题考查与过去事实相反的虚拟语气，从句用过去完成时。故D项正确。 | 
