Example sentences of "must [be] [verb] not [to-vb] [det] " in BNC.

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1 But the author ( and readers ) will want some written commentary to accompany the figures and here caution must be exercised not to claim more than the figures warrant .
2 She patted his hand and smiled , then pursed her lips together as if they must be forced not to speak another word .
3 However , care must be taken not to touch any part of the exposed nozzle as this quickly heats up .
4 A hacksaw may be the only possible tool to cut existing pipe which is installed against a wall ; however , the disadvantages of a hacksaw are that it produces fine copper filings ( and care must be taken not to get these into the pipes ) and that it will tend to flatten the pipe slightly — particularly if this is held in a vice .
5 Care must be taken not to read more than is said into reports from others , particularly since the Regulations exclude access to the original report but a teacher 's use of it may be on the record .
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