Example sentences of "have [be] use [prep] a " in BNC.

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1 But few dogs make better companions than a well trained Shepherd , and they have been used for a wide variety of tasks , aside from their traditional role of protecting flocks of sheep .
2 It may be obvious , as with lead shot from shooting or fishing producing elevated levels of Pb +&plus Sn +&plus Sb , batteries ( Pb +&plus Sb ) and brass ( Cu +&plus Zn ) but sometimes it may be more subtle where agricultural chemicals ( for example U in phosphates ) have been used on a wide scale .
3 Through the ages these western seaways have been used as a highway by settlers and saints , pilgrims and pirates and traders and travellers .
4 The Thornton Gate Mineral sidings , which since 1963 have been used as a rail store , showing car 170 towing a train of rail bogies .
5 In an exhaustive study the Brookings Institution identified 190 incidents between 1944 and 1979 where the armed forces of the USSR have been used as a political instrument in peacetime .
6 Such assumptions have been used as a partial justification for women 's ineligibility for social security benefits .
7 Hedges have been used as a positive design element : yew to provide shelter and screening at the front of the property ; box , fashioned into sweeping curves at a lower level .
8 The ergot alkaloids given therapeutically in migraine have been used as a diagnostic test for coronary artery vasospasm , with a diffuse reduction in arterial diameter of about 30% evident in normal arteries .
9 It has also encouraged the use of new financial control mechanisms such as external financing limits , which in Britain since 1979 have been used as a covert pay policy ( Heald and Steel 1981 : 15 ) .
10 Some of them have been used as an indirect way of seeing the file by parents denied access for themselves .
11 Why , ‘ for over 200 years , gallstones have been used as an ingredient for producing Chinese medicine for controlling fever with similar effect of antibiotics . ’
12 Signs based on colour-coding systems have been used in a number of libraries , for example at Hatfield Polytechnic Library , England ( one of the pioneers in this field ) and Chalmers University Library , Sweden .
13 The Parkinson and Garman and Klass estimators of volatility have been used in a number of the empirical studies considered below , e.g. Grammatikos and Saunders ( 1986 ) , Chamberlain ( 1989 ) , Board and Sutcliffe ( 1990 ) and Serletis ( 1992 ) .
14 In the past , Quality Circles have been used in a similar way but their scope was limited in comparison .
15 Such programs have been used in a number of curricular areas .
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