Example sentences of "[pron] have proved to [be] " in BNC.
Next page| No | Sentence |
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| 1 | If we want to know in precisely what circumstances such a gene would increase in frequency , we have to carry out calculations which have proved to be full of pitfalls for the unwary . |
| 2 | Despite these changes , some of which have proved to be environmentally degrading , there is still a food crisis because population growth is rapid ( 2–3 per cent per annum ) and farming systems are failing to provide the necessary increase in productivity of c. 4 per cent per annum ( Okigbo 1985 ) . |
| 3 | In a previous issue , Guitarist ran an article on callisthenics , in which I invited readers to submit exercises which have proved to be particularly useful . |
| 4 | Pieces which have proved to be of enduring worth have passed from special conference song books into collections with a wider circulation . |
| 5 | However , the Commerce and Industry Group of the Law Society does offer a range of lectures and meetings which have proved to be useful . |
| 6 | His research focused on poly-crystalline diamond compact ( PDC ) drill bits , which have proved to be the most cost effective for the deep , interbedded Colombian wells . |
| 7 | Search unemployment can be seen as part of the annual turnover of the job market — firms rid themselves of workers who have proved to be unproductive or unsatisfactory in some way , and workers quit jobs which have failed to meet their expectations or which were intended only as stop-gaps in the first place . |
| 8 | Anthony Clement has played superbly of late , as have Scott Gibbs and Aled Williams , who have proved to be two fine acquisitions . |
| 9 | Upon the whole you have proved to be |
| 10 | A number of different drugs have been claimed to prevent sickling in vivo , but none have proved to be effective without unacceptably severe side-effects . |
| 11 | Radiotherapy has no proved value in the treatment of gastric cancer and while there have been numerous trials of various chemotherapy regimens , none have proved to be valuable either as an adjuvant treatment or for advanced disease . |
| 12 | Over the years we have proved to be an effective and efficient council and I believe you have all contributed greatly to making Lothian such a progressive authority . |
| 13 | Sometimes they have proved to be persuasive and have become the new majority view . |
| 14 | They have proved to be adaptable to a wide variety of climates and environments , able to tolerate heat and cold and with a high resistance to disease . |
| 15 | In several countries local ‘ curriculum implementers ’ of one species or another have been appointed and in the main they have proved to be conscientious and down-to-earth professionals who do an exceptionally useful job . |
| 16 | They have proved to be most useful in identifying bands due to metal-ligand vibrations in complexes , in the same way that samples containing isotopically-substituted ligands allow identification of ligand modes [ 21 ] . |
| 17 | In many areas where they have been established , staying on rates have risen and they have proved to be popular with students and staff alike for a variety of reasons . |
| 18 | I believe they have proved to be responsible bodies , who have worked well with their Chief Constables and the local authorities their members represent and they are proud of the forces they are providing . |