Example sentences of "[verb] been [adv] [v-ing] since " in BNC.

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1 Livingston 's latest results are already telling us something new ; he has found that the Sun 's temperature ( and thus brightness ) reached a minimum in the summer of 1981 , but has been gradually increasing since then .
2 The expenditure involved with election campaigns has been rapidly increasing since 1976 .
3 PC-NFS 4.0 , on the other hand , has been quietly shipping since March 19 , but SunSelect , a beta site for Windows 3.1 , could n't announce it until Microsoft officially unveiled 3.1 at Comdex .
4 He imagined bone-wrenching exercises and an accelerated real-food diet , such as had been distinctly lacking since his father 's shaming .
5 That domination brought a unity to the north which had been notably lacking since the end of the previous century .
6 That domination brought a unity to the north which had been notably lacking since the end of the previous century .
7 Deng Xiaoping , China 's " elder statesman " leader , had considerable success during March in his effort to reinforce the reformist line which he had been actively promoting since early January .
8 Numbers have been gradually declining since the 1970s .
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