Example sentences of "could have been [verb] [noun sg] " in BNC.

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1 In fact , the high quality of iron ore available to the Romans in Britain combined with the use of charcoal fuel in the smelting process , meant that they could have been producing steel which would have given a much harder and sharper edge to the blade than normal iron .
2 Perot was furious ; instead of chasing chimeras , his money could have been earning interest in the bank .
3 He could have been composing rubbish for all I was competent to judge , yet that possibility did not enter my head .
4 Several muffled sounds came from Mandru 's corner of the room , which could have been stifled laughter or exclamations of surprise .
5 Why Mr Jones did n't book him for what could have been deemed incitement in front of Newcastle 's followers will remain a mystery along with his dropball doodle-bug .
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