Possible variations of conditional sentence type 3
Variations of the “main clause”
Could or might can be used instead of would.
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If I have found earlier, we could/might have saved his life.
The continious form of the perfect conditional can be used.
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At the time of the accident I was sitting in the back because Tom was sitting in front. I Tom had been there,
I would have been sitting in the front.
Variations of the “if clause”
Instead of if + past perfect we can use if + past perfect continious.
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If I hadn’t been wearing a seat-belt, I would have been injured.
A combination of conditional sentence type 2 and 3 can be used.
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The plane I intended to catch crushed and everyone died.
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If I had caught that plane, I would be died now.