Example sentences of "have [been] [v-ing] at a [adj] " in BNC.

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1 Coupled with this , however , we have to remember the huge concentration of such sediment in deltas such as that of the Mississippi , where it has been accumulating at a fantastic rate ( perhaps 10 000 feet in the same period of time ) .
2 Retail price maintenance still being lawful in the case of books , the publisher might well include the recommended retail price on the cover of the book ( or in an advertisement ) , only to be surprised subsequently to learn that a retailer has been selling at a different price .
3 The group had been drinking at a nearby pub in Uckington , Glos .
4 Levels of intermarriage , in the first place , varied considerably from republic to republic and from nationality to nationality ; and although the proportion of ethnically mixed families at the national and republican level might have been increasing , it did not necessarily follow that the incidence of intermarriage between each of the major nationalities had been increasing at a similar rate .
5 My social history is very different from Trevelyan 's , one of the most remarkable books on English social history , because of course I come from a very different background , I 've different experience from Trevelyan , but also I 've been writing at a different time .
6 The method of carbon dating is based on the assumption that these two reactions have been occurring at a constant rate for the past 15000 years .
7 Along with the rest of the property sector , British Land 's shares have been trading at a considerable discount to its assets per share , and yesterday 's move is an attempt to close the 40 per cent gap which built up as institutions took a dimmer view of the market .
8 Although the reprocessing plant itself has been shut for annual maintenance since February , discharges have been continuing at a reduced volume .
9 Economic analyst Alex Henney , who has made a detailed study of the economics of nuclear power , estimates that , looking at the total balance sheet , the CEGB 's nuclear activities have been running at a substantial loss .
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