Example sentences of "did not prove [prep] [be] " in BNC.

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1 In practice , this did not prove to be the case .
2 This discovery did not prove to be particularly useful because the metabolite is a mycotoxin and mildly carcinogenic , illustrating that toxicological testing is just as important for natural products as it is for synthetic chemicals .
3 However , serum triglyceride levels did not prove to be a significant factor for coronary heart disease in this multivariate analysis and this is probably because of the correction made for the inverse relationship between triglycerides and HDL .
4 Unfortunately their quality did not prove to be high .
5 Despite such transmutations , the task of spiritualizing institutions of state power did not prove to be easy .
6 Beautiful as the creature is , and instructive as the study of its behaviour has been , the octopus did not prove to be god 's organism for the elucidation of memory .
7 At that time it was paying £3 per fathom but the vein did not prove to be worth following very far .
8 The poll tax did not prove to be a good benefit-related tax .
9 On the whole , with certain exceptions — such as Egyptian cotton and Indian jute — these economic specialisations did not prove to be permanent , or else , where permanent , they did not develop on any scale comparable to that of the twentieth century .
10 There was the question of cancelling the whole Festival , but fortunately that did not prove to be necessary , and by the end of the week the strike collapsed — and , tragically , the men went back to work having gained nothing .
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