Example sentences of "have been [verb] [prep] time " in BNC.

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1 ‘ Obviously some of the locos at the Snowdon Mountain Railway have been fitted from time to time .
2 In the illustration in table 5.4 three values have been placed on time spent travelling , a frequent element in many CBA analyses .
3 They have been revised over time — usually downwards — and they vary significantly from country to country .
4 A few freaks have been discovered from time to time , one amazing animal tipping the scales at no less than 43 lbs and a dwarf specimen at as little as 3 lbs , but these were abnormal .
5 ( Errors in calculation have been made at times , but discovered only when the water began to flow and it was found that the levada went uphill . )
6 Snakes have been mobbed from time to time by groups of ground squirrels .
7 Certain other mechanical effects have been mentioned from time to time .
8 Letters addressed to the present writer have been opened from time to time from at least 1973 to the present .
9 Third party navigation rights have been suspended at times of crisis .
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