Example sentences of "[is] [verb] when it [verb] " in BNC.

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1 Another typical resistance is met when it becomes clear that despite everything that is being achieved in terms of family understanding and awareness , individuals are sticking rigidly to old patterns of interaction and behaviour .
2 Four-wheel-drive cuts out when the tractor 's forward speed goes above 9.3mph and is re-engaged when it drops below 8.7mph .
3 A group is recognised when it has a minimum of six SERA members .
4 Old providers of employment are artificially kept alive until a point is reached when it becomes obvious that support must be switched off .
5 Jennings says the minizyme is activated when it combines with its target , an advantage over other anti-viral agents in that it limits the prospect for side effects .
6 A behavioural response is strengthened when it has an increased probability of occurring ( frequency ) or when it is likely to be performed for a longer period of time ( duration ) .
7 A cell 's true nature is realized when it becomes skin or bone or nerve ending .
8 For both sides , utmost care and modesty is required when it comes to intercepting the results , and speculating on the closeness between the species .
9 The government , they say , is bluffing when it claims that TECs are intended to tackle Britain 's persistent skills shortage .
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