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If I had V-ed, I would ……
结构︰If…had+过去分词…，主词+would/should 等+原形动词+now/today
说明︰这是<时态>不一致时的假设<句型>，亦称混合假设条件句。即：if <子句>若与过去事实相反，用<过去完成式>表示；而<主要子句>若与现在事实相反，则用过去式<助动词>表示。此类<主要子句>句尾通常有表现在的<时间副词>，如 now，today 等。
If he had worked harder when young, he would be well off now.
如果他年轻时多努力一点，现在就能过得舒服些。
If I had been rich ten years ago, I could buy that house today.
如果十年前我有钱，今天我就能买下那栋房子了。
Had he told the truth, he wouldn't be punished now.
如果他当时肯说实话，现在就不会受罪了。
Had he followed the doctor's advice, he might be alive now.
当时他要是听了医生的建议，现在可能还活着。
I wish …… + V-ed ……
结构︰I wish+（that）+主词+动词过去式/过去完成式（had+过去分词）…
说明︰I wish 之后以 that <子句>为<受词>时，该<子句>的<动词>一定要用<假设语气>：若<动词>用过去式，表示与现在事实相反的愿望；若用<过去完成式>，则表示与过去事实相反的愿望。“I wish+that-<子句>”的<句型>也可用“I would rather+that-<子句>”取代。而 I hope 之后以 that <子句>做<受词>时，该<子句>用一般<时态>.
I wish there were meadows and lambs.
但愿有草地与小羊。
I wish I were as tall as you.
但愿我像你一样高。
I wish he could tell us.
但愿他能告诉我们。
I wish （=I would rather） he could #e tomorrow.
但愿他明天能来。
I wish you had not been caught in the rain yesterday.
但愿昨天你们没有淋到雨。
I wish you had not told the truth.
但愿你没有说实话。
I wish I had known you ten years ago.
真希望十年前就已经认识你。
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