Example sentences of "but they have [adv] [be] [verb] " in BNC.

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1 In Nanking also , they had to build them as a safety measure , but they have either been dismantled or moved out of sight .
2 Some have worked at Bentley pianos for forty years , but they have n't been offered a penny in redundancy pay .
3 Some others were fitted a few months ago but they have n't been wired up to the Economy meter and we dare n't use them because we would n't be able to afford the bills . ’
4 The nuts have been shelled , but they have not been skinned .
5 We all take the use of coins for granted , but they have not been made or used by all metalworking societies .
6 Cracks across the crowns occur quite commonly ( Fig. 3.16A ) , but they have not been counted as breaks unless there is actual separation of the two pieces .
7 Some North American theses on Scottish geology exist , but they have not been taken into account in the present study .
8 ‘ The Maktowms have been big spenders at Newmarket , but they have never been made really welcome there , ’ an insider told me .
9 As for ‘ le piston ’ , it is true that three senators have been accused of fraud , bribery and tax evasion in the past three years , but they have all been cleared of these charges by other senators .
10 Meichenbaum first developed these techniques in 1974 but they have recently been extended and detailed by Meichenbaum and Cameron ( 1983 ) .
11 Other , ‘ professional ’ drugs have been designed to overcome some of these problems , but they have often been designed to have even more worrying characteristics .
12 A number of experiments on bone modification in soil have been initiated , but they have only been running for five years and so far there is no good evidence of any change .
13 Tigers in southern China formerly supplied much of the demand , but they have now been hunted virtually to extinction .
14 Instead , the number of synonyms has been calculated , but they have then been ignored by the mathematics , and so have not interfered with the ‘ storage ’ of other records .
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