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

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1 A step-family is created when two adults form a new household in which one or both brings a child or children from a previous relationship .
2 Less tape is wasted when large files are used .
3 Winter will be a problem because the whole body of water will cool ( a pond has its base temperature protected by the earth ) so a heater is needed when freezing temperatures are expected .
4 A stunning finale is created when panoramic views of the existing castle ruin are overlaid by specially commissioned paintings reconstructing the entire castle as it was 700 years ago .
5 But this argument is weakened when democratic arrangements break down and are not replaced by socialism , as has frequently occurred in industrializing countries .
6 Maximum efficiency is achieved when these factors are optimised in relation to each other .
7 What extra significance is added when different items are put together ?
8 Holland Park , London and a private photographic shoot is disrupted when zealous fans find out what is going on .
9 The second caveat is that even this amount of support is reduced when hypothetical compromises are put to the public .
10 A stage certificate is awarded when all aspects of a stage have been passed .
11 M paratuberculosis positivity is established when IS900-PCR results in the amplification of a 400 bp product .
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