Example sentences of "may [adv] have [vb pp] as a " in BNC.

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1 The largest so far identified lies west of Ryknild Street , emphasizing the fact that the road may once have acted as a settlement boundary .
2 It may possibly have begun as a baptistry or succeeded a cult centre at the spring head .
3 Around the east side of the defences , a possible flood bank may also have doubled as a bypass road , though this is probably relatively late .
4 It may also have acted as a service centre for the nearby imperial estate centred on Combe Down and for the numerous rich villas which grew up in the vicinity .
5 Here he may well have acted as a diplomatic go-between in introducing them to the Roman traders , whose imports have been found at their main centre , the great oppidum at Bagendon near Cirencester .
6 She may subsequently have worked as a governess or tutor .
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