Example sentences of "these [modal v] [adv] have been [verb] " in BNC.

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1 Although John Leland in the 1530s described a town apparently prosperous from the condition of its buildings , these may well have been erected before the decline set in .
2 These may originally have been compiled by a Touraine monastic house so that the new rulers of the area could be commemorated in its prayers ; but like the genealogies of the comital house of Flanders , they were soon adapted to a more secular purpose .
3 Media Types must be in the range 1 to 10 and these must previously have been introduced using option 9.5.0 — Update Media Types .
4 Media Types must be in the range 1 to 10 and these must previously have been introduced using option 9.5.0 — Update Media Types .
5 These would probably have been deposited at different times , and the detailed examination of their contents will , in theory , reveal a progression of different parts of a coinage ; if one or more of these parts can be attached to an absolute date , it should be possible to estimate a date for the other parts in the progression or sequence .
6 By 1914 the exchanges were filling 3,000 vacancies a day , but these would perhaps have been filled even in their absence .
7 These would originally have been topped with a fence of dead wood or a live hedge to keep the animals out .
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