Example sentences of "how it could have [verb] " in BNC.

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1 Therefore , if the origin of the phenomenon is as recent as the late eighteenth century , it is difficult to explain how it could have become so geographically widespread in so short a time : it was already highly salient and overtly stigmatized by the latter half of the nineteenth century ( for some citations see Phillipps , 1984 , 136–9 ) .
2 She found it perplexing and wondered how it could have affected her lessons with Miss Hatherby .
3 This terrible matter has brought shame on Leicestershire , and we expect to get to the heart of how it could have gone on for so long , while apparently nobody did anything about it .
4 Now if that was totally inherent at the time , then I really fail how to see how it could have done eighty thousand miles , and I think that may be a point that 's put across at the same time .
5 When the same species was found occupying two separate territories , it made more sense to work out how it could have migrated from one to the other than to assume that it had been created independently in each area .
6 In other words , we identify a particular event as the cause because we know how it could have made the effect happen , not because we know it happened before the effect .
7 This discrepancy is disturbing , and it is not obvious how it could have arisen , especially because the abstract and the full paper report on the same follow up period .
8 Scientists in both continents are now working discover the cause of the plague , and how it could have spread to Europe .
9 ‘ I knew I had n't done anything to Joanna and at the same time I was totally confused as to how it could have happened . ’
10 There was lack of comprehension at how it could have happened and why the 63th Army could not have been relieved , and little consolation for bereaved relatives in the official interpretation of ‘ heroic sacrifice ’ .
11 She was completely in the dark about how it could have happened . ’
12 Her own imagination suggested how it could have happened .
13 ‘ Never mind how it could have happened .
14 She had no clear idea of how it could have rolled from the table , for it had seemed perfectly secure when she had put it there .
15 Nevertheless , a broad understanding of the present Jovian interior , and how it could have got that way after its initial formation , now exists .
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