Example sentences of "[noun pl] have [adv] far failed [verb] " in BNC.

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1 New prototypes have so far failed to satisfy him .
2 But excavations have so far failed to support this image and indeed have indicated a town in decline .
3 Scientists had so far failed to include this in their models .
4 Neighbourhood Watch vigilantes have so far failed to apprehend the culprit .
5 Investigations have so far failed to identify the cause .
6 Police inquiries have so far failed to track down the culprits and now the victim has appealed for his heroic rescuer to come forward and help the investigation .
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