Example sentences of "[noun] [verb] [adv] know for " in BNC.

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1 ‘ We knew the dangers and my husband Sammy and son Neil did n't know for sure we would come back .
2 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 .
3 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 .
4 Patrick does n't know for you know one log from another .
5 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 .
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