Example sentences of "know [Wh adv] long [pers pn] had " in BNC.

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No Sentence
1 He did not know how long he had been sleeping but woke up hungry and decided to sneak into the kitchens for a tin of soup .
2 A fire brigade spokesman said : ‘ We do n't know how long he had been there but he was shivering and shaking .
3 A brigade spokesman said : ‘ We do n't know how long he had been there , but he was shivering and shaking .
4 I do n't know how long it had been there .
5 er do you know the er , it looked a fairly new building , I do n't know how long it had been going , she 's a member of the something club
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