一、if条件从句中的虚拟语气
类 型 用 法 例 句
引导的条件从句 与现在事实相 从句谓语动词:过去式(be用were)主句谓语动词:should/would/could/might+动词原形 Sorry, had time, I would certainly go for an outing with you.
很抱歉我现在非常忙。若我有时间我将一定与你外出郊游。
与过去事实相反 从句谓语动词:had+过主句谓语动词:should/would/could/might+have+过去分词 (2017·高考北京卷)If we had booked a table earlieruldn’t be standing here in a queue.
如果我们早订张桌子的话我们就不会站在这儿排队了。
与将来事实相反 从句谓语动词:过去式/were+不定/should+动词原形主句谓语动词:should/would/could/might+动词原形 Grace doesn’t want to move to New York because she thinks if she were to live there, wouldn’t be able to see her parents very often.
Grace不想搬到纽约因为她想如果要是住那里她将不可能经常地见到她的父母。
引导的条件从句的倒装 如果在表示虚拟语气的条件句中含有were或should可将if省略然后将were或should移至主语之前。 Had we made a great effort we might have succeeded.(=If we had made a great effort...)要是我们付出巨大的努力也许我们已经成功了。
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