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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︰这是不一致时的假设，亦称混合假设条件句。即：if若与过去事实相反，用表示；而若与现在事实相反，则用过去式表示。此类句尾通常有表现在的，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。