Example sentences of "[not/n't] know for certain " in BNC.
Next page| No | Sentence |
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| 1 | I do not know for certain why I went up there to watch them doing it . |
| 2 | And though we do not know for certain , it does seem doubtful that the only sins against EPA science are those that have been revealed . |
| 3 | We do not know for certain what the total membership of any such set is , how many items belong to it , or the extent to which speakers vary in assigning items to the set . |
| 4 | However , at the beginning of the year we can not know for certain what the inflation rates will be ; we can only have expectations about what they will be . |
| 5 | A senior officer said : ‘ We have not exhausted all our enquiries yet and we do not know for certain if those ransom calls were the work of cranks . |
| 6 | Answering this kind of question will inevitably involve you in a certain amount of guesswork , because you ca n't know for certain what has been going on , but some assumptions are more likely than others . |
| 7 | We do n't know for certain but it was probably to be given to you on your arrival . ’ |
| 8 | Already the ‘ What I want for Christmas ’ letters are pouring into Mr Brooke , although the goodies ( we do n't know for certain what they will amount to — that would spoil the surprise — but if we are lucky they may amount to £36 million per sector ) will not be dispensed for two years at least . |
| 9 | It does n't know for certain , so it simply doubles whatever free space it thinks is left — after all the software is n't psychic and ca n't know what files are going to wind up on the hard disk . |
| 10 | What Ah do n't know for certain is what happened immediately before that . |
| 11 | ‘ I should n't think so for one minute but I do n't know for certain . ’ |
| 12 | ‘ The common denominators in all these factors , as a mathematician would say , are Dacourt and Millet but , first , we do n't know for certain if the wine sent to the Abbe Gerard was in fact the same he was drinking the night he died . |
| 13 | That Mr er did live at the flat erm with his wife , there may have been children but we did n't know for certain and that the previous night two male persons appeared to have been there . |