Example sentences of "did not know for " in BNC.

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1 She thought that her father probably now earned more than £100,000 a year , but she did not know for sure because it was nine years since she had last visited him , four years since she had last received a Christmas card from him .
2 What the precise purpose was of installing complex electronics in an old sailing vessel he did not know for sure , and Iain did not press him .
3 She knew , although she did not know for quite how long , she had been running aimlessly .
4 Ages recorded on death certificates ( and to a lesser extent on marriage certificates ) were not always accurate because the informant did not know for sure .
5 Left staring at him while waiting for her full wits to return , Leith did not know for the moment what on earth was going on .
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