Example sentences of "[noun pl] may have been produced " in BNC.

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1 In some cases the overlay will not be completely accurate as the different maps may have been produced at different times by different teams of surveyors .
2 They hide in situations of complexity , in which effects may have been produced by several different causes acting together .
3 While there are less accomplished versions of the more elaborate examples in a given region , as in Kent , the virtuosity of the buckle , shoulder clasps and purse from mound 1 at Sutton Hoo inevitably led Speake to talk of a Sutton Hoo master craftsman and a workshop ; later pieces may have been produced by workers trained there .
4 Equally clay moulds may have been produced by carving in the negative directly onto the clay ; while carving a negative is difficult it was achieved with success at other times , for instance in the medieval period with stone moulds .
5 Wyrdwriteras may have been produced in response to attacks on Æthelred for not leading his troops personally , and although Ælfric seems ( in the extant portion , at least ) to defend this policy , there could be implied criticism of the king 's choice of commanders who were often less successful than those in the examples cited .
6 Some of the patterns shown are so elaborate that it seems doubtful that they were woven : some may have been printed with blocks , while others may have been produced by a mixed-medium method , combining printing , embroidery , and appliqué work .
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