Example sentences of "have be caused [prep] [adj] [noun] " in BNC.

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1 It was of little concern to Dan that much of the weathering may have been caused by industrial pollution — what mattered was that science had found an answer .
2 A head-on car crash in which five women were killed may have been caused by flat tyres .
3 It could have been caused by extensive lava flows or by a more extreme form of the sort of surface plasticity seen in many of the oldest surviving features .
4 Defence experts indicated that the incident , which occurred during naval exercises some 80 miles west of Izmir , might have been caused by excessive stress among junior officers prompted by a long spell at sea .
5 The higher skin damage measurement in the lower layer indicates that loss circulation material possibly was stuck in the producing rock , a condition that might have been caused by initial drilling operating practices , says Chris Drysdale , Well Evaluation group leader .
6 He says it could be an accident , but it could also have been caused by another person .
7 Considering that Ubogu had started the game with a wide bandage protecting his ears the injury was surprising and could only have been caused by heavy treatment from something metallic .
8 Again on Bruno Zanardi 's restoration of Antelami 's ‘ Months ’ , Fiorella Minervino wrote that the marble had lost its characteristic surface veining ; in her opinion , this was probably due to the use of a chemical solvent to extract the metallic salts which had appeared on the surface , or it may have been caused by some kind of abrasive treatment .
9 ‘ It could have been caused by some sort of disaster or accident .
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