Example sentences of "have [not/n't] prove to [be] " in BNC.

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1 The Woonerf , though without doubt a valuable contribution to safe living areas , has not proved to be a universal solution .
2 At one time it was thought that high-fibre diets containing bran would be successful , but this has not proved to be the case .
3 With very few exceptions , however , this has not proved to be the case , largely because Latin American states have retained a high degree of integration with , and dependence on , the developed capitalist economies .
4 The index has not proved to be a reliable feature of either constipation or diarrhoea .
5 The January 1989 white and fawn dog finished second in a 631 metres open at Sunderland , and switching to Middlesbrough 's inside hare has not proved to be any problem .
6 As things have turned out it has n't proved to be a serious drawback so far ; and your mother , who has temporarily left home , is very happy for me .
7 Sadly , of course , it has n't proved to be the entire answer because the original FOND resource can only cope with the four basic stylistic variations ; Plain , Italic , Bold and Bold Italic .
8 The uranium ore he was carrying had not proved to be radioactive , his lawyer said .
9 In addition , cuts in Via Rail services and reductions in other federal expenditures had not proved to be politically popular .
10 Maintenance costs have not proved to be excessive , particularly as local residents are encouraged to adopt part of the street greenery .
11 Not only is the method not scientific but , to the extent that Marx did make certain historical prophecies which can be related to empirical evidence over long periods of time , these can be examined and by and large they have not proved to be valid .
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