Example sentences of "for [pers pn] [prep] [be] sure " in BNC.

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1 Now one of the problems is that doctors are rather reluctant to do that because it 's very difficult for them to be sure that a particular headache or a particular skin rash has been caused by one of the medicines which the patient was taking , so the doctors are not very good at filling in the yellow cards and these are not a very good way of reporting adverse reactions , and to get over that we are starting now to use computers .
2 It is difficult for me to be sure that I 'm objective , so I think I will go by what other people said .
3 Peering closer he thought he could see a smear roughly the same length on the jacket pocket , but the cloth was too dirty for him to be sure .
4 Or his own self-deception ; she had unseated him too deeply for him to be sure any longer of the distinction .
5 If only she and Michael had more time together , time for her feelings to rise close enough to the surface for her to be sure of what they were .
6 The numbers involved ( in detailed cross-tabulations not reproduced in Appendix I ) were too small for us to be sure about this .
7 In general , it can often be difficult for us to be sure just what is going on in supposed examples of communication .
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