Example sentences of "know [Wh det] it [be] for " in BNC.

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1 Yes especially cos you do n't know what it 's for half the bloody time , she does n't know where she is .
2 I 've heard that phrase used but I do n't know what it 's for .
3 If one can notice the absence of something one must already know what it is for things to be absent .
4 It 's been very hard for years , and now , to be back here , you do n't know what it is for me .
5 If your experiment involves other people ( e.g. if you are comparing different readers ' responses ) , you need to consider ethical issues which arise , including ( a ) getting their permission to use the results ; ( b ) showing them the results and explaining them ; ( c ) not using their names when you report the experiment ( even if they have given permission for this , there is unlikely to be any point ) ; ( d ) the ethical problem that sometimes an experiment is best conducted if the test subjects do n't know what it is for ; that is , if there is a " secret agenda " .
6 Oh I heard the bell but I did n't know what it was for !
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