Example sentences of "have [be] [vb pp] for several [noun] " in BNC.

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1 • In rodents , rhythms continue to develop in animals that have been reared for several generations in constant conditions .
2 • In rare instances , new-born babies have been studied for several months in a constant environment in a hospital ward .
3 But we know very little about the animals which bore these scales and although a few articulated remains have been known for several years , they show very little anatomical detail and it is not easy to identify immediate relatives .
4 We have been told for several centuries now that every child is naturally different and it is therefore wrong to impose on one the mould which has been prepared for others unlike it .
5 These sectors have been chosen for several reasons : their services are provided for wide sections of the community ; they are major employers ; and new technology is being introduced into their central work activities .
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