Example sentences of "have know for [noun] " in BNC.
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| 1 | Geologists have known for decades about ‘ natural fission reactors ’ in very ancient rocks at Oklo in Gabon , West Africa . |
| 2 | The scientific world is beginning to discover what metaphysical teachers have known for centuries , that our world is not composed of any matter at all and that its basic component is a kind of energy or force . |
| 3 | The pits where the birds have buried their eggs are quite easy to spot — as human predators have known for centuries — by the slight mounds left by the birds at the surface . |
| 4 | But lay people can also make good directors — perhaps someone you have known for years , or , say , your house group leader . |
| 5 | It 's only in the last few years that everyone has begun talking seriously about fibre in diet , although those who have always eaten a breakfast that includes all-bran have known for years about the virtues of fibre . |
| 6 | Veterinarians , horticulturists and environmental scientists have known for years that fluoride at very low concentrations can damage vegetation , aquatic life and livestock ; chemists have learnt to expect the unexpected from this unpredictable element ; and biochemists , physiologists and toxicologists all know that fluoride is a potent poison of enzymes . |
| 7 | I really enjoyed experimenting with the Utopia , although I would argue that while one company 's products are undoubtedly the most compatible from the technical standpoint they might not be the best combination for sound — something hi-fi buffs have known for years . |
| 8 | We have known for years that there are many wrecks which could be of historical value , telling us about the way in which vessels were constructed and , from their contents , about how ordinary people lived in times past . |
| 9 | The said partnership is for economic strategy planning and they have current consultancy projects in what was the USSR , and the one of the three I have known for years , as he shared a Lothian Regional council office with our former upstairs neighbour , lovely now in lake district is off to Moscow next Monday and then to another city ( ? sp ) six thousand miles east of Moscow ! |
| 10 | Yet in being forced to come to the Commons to tidy up the mess — though splattering egg on the faces of the Foreign Office lawyers and his colleague Tristan Garel-Jones in the process — Hurd confirmed what a few MPs have known for months . |