Example sentences of "factor have [be] the [noun sg] " in BNC.

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1 However , a further significant factor has been the change in the way that users themselves view these units .
2 The third factor has been the democratisation of civil liberties .
3 The second special factor has been the role played by the Murid Brotherhood , an Islamic movement founded in the first decade of the twentieth century by Amadu Bamba , which has played a key political role in delivering support first for the French colonial authorities and later for the governments of independent Senegal .
4 Part of the increase is due to more young people forming independent households , but the most important factor has been the growth in numbers of elderly widows and widowers .
5 Tony felt that one important factor had been the change in his father 's attitude so that he now seemed to understand how he felt .
6 The same day it transpired that an additional factor had been the judge 's decision to dismiss " public interest immunity " certificates which had been signed by four senior ministers and which would have prevented the disclosure of certain information about the case .
7 Another factor had been the effort to help with the Museum project .
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