Example sentences of "have [been] considerable [noun] " in BNC.

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1 In fact there have been considerable variations in the atmospheric 14 C production rate .
2 Anyone who studies academic standards in our schools over the past 20 years must recognise that there have been considerable improvements .
3 There have been considerable changes in vocabulary and slight changes in pronunciation over the last fifty years .
4 Although there have been considerable changes in the machinery of statutory planning and in the scope of the development/structure plans , the powers available to planners have altered little .
5 The hon. Member for Ogmore ( Mr. Powell ) made a good point at the beginning of the debate when he said that there have been considerable difficulties in redesigning the Shops Act 1950 to meet the requirements of the 1990s .
6 It has recently been recognised that there have been considerable liquidity problems both before and after Big Bang for some of the smaller companies listed on the ISE , prompting some calls for a two-tier market .
7 However , despite early adoption there have been considerable doubts as to the effectiveness of such rational approaches .
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