Example sentences of "may have [verb] [to-vb] [adj] [noun] " in BNC.

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1 Among the mechanisms that may have evolved to resolve genetic conflicts are sex , Mendelian genetics , the existence of two sexes , the rarity of hermaphroditism and the equality of the sex ratio .
2 The lack of spatial learning with moving landmarks suggests that spatial learning processes may have evolved to extract geometric invariance from the environment in a manner analogous to that in which conventional associative learning principles are held to extract the ‘ causal structure ’ of the environment .
3 But in the circumstances of 1483 an immediate accession may have seemed to offer real advantages .
4 But in the circumstances of 1483 an immediate accession may have seemed to offer real advantages .
5 In the first case , fieldworkers may have wished to retain certain functions , such as working directly with children and young people , as their prerogative , because they considered themselves to be better trained to undertake these tasks , albeit with limited time at their disposal and with , in some instances , limited skills .
6 The Anti-Corn Law League may have helped to secure Whig support but what Peel himself called in a letter to Cobden his " 'sense of public duty " was more influential . "
7 The prospect of such a deal may have helped to boost Colombian exports to Mexico by 27% last year .
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