Example sentences of "that have been [verb] [v-ing] " in BNC.

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1 Various techniques will be discussed here , and the main solutions that have been obtained using them will be described in the next chapter .
2 In addition to pottery , the core material from bronzes that have been cast using a clay core ( see p. 84 ) can also be tested by TL , since this ceramic material has normally been fired to a sufficiently high temperature to ‘ zero the TL clock ’ .
3 Roses in the second category — including those that have been repeated flowering well into autumn — are pruned towards the end of the winter dormancy period when the sap begins to move , and the axillary growth buds begin to swell .
4 When they are eight weeks old , for example , mouse pups that have been conditioned using mild electric shocks to their feet readily learn to swim through a simple water maze .
5 Falling over toys that have been left lying around can be fatal for elderly people and very serious for children .
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