Example sentences of "[noun sg] [is] [verb] [adv] [adv] when " in BNC.

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1 When food is clumped in groups , the best method of search is to move straight ahead when not in a group , but to turn through tight angles once one item has been found , in order to find the rest of the group .
2 A fragment from an altarpiece can not be appraised in just the same way as an independent portrait ; and a craftsman 's skill is esteemed more accurately when the materials used are rightly identified .
3 Wet cooling towers and air conditioning systems are regularly inspected and conditions monitored so that cleaning is carried out only when necessary but is done by thoroughly trained staff .
4 What we mean by this is whether a syntactic analysis is carried out even when it is rendered unnecessary for sentence comprehension by the presence of semantic or pragmatic factors .
5 Power is used most effectively when it is used unobtrusively .
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