Example sentences of "do not know for " in BNC.
Next page| No | Sentence |
|---|---|
| 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 | The Trinidad crashed near Madrid , and to this day we still do not know for sure what happened . |
| 4 | But even if we discover that vineyards vanished from south east England at a time when the climate was getting colder , we still do not know for sure why they disappeared . |
| 5 | How long it took the different ancestors of these very different animals to evolve such tongues we do not know for there is no fossil evidence of any antiquity to tell us , but it must have been several million years . |
| 6 | 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 . |
| 7 | Then , when price is low firms do not know for sure whether it was because someone cheated ( produced a larger than agreed output ) , or because demand was low . |
| 8 | 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 . |
| 9 | Exactly how it happened we still do not known for sure but you can find examples of the kind of organisms it produced in almost any patch of fresh water . |