Example sentences of "have be [v-ing] [noun] for [num] " in BNC.

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1 Six patients are still alive and have been undergoing tratment for 5.5–24 months ( median 15 months ) .
2 Negotiations between the National Trust and MoD have been taking place for two years and have reached a critical stage .
3 The Society needs more teachers ; many of teachers have been taking classes for 20 years or more !
4 These schools have been using microcomputers for three years and have had substantial teacher training , provision of materials and other support services from the ILEA .
5 I have been producing guidebooks for fifteen years and I have never thought of that .
6 Here in an ancient Herefordshire broadleaved wood , members of the local Nature trust have been monitoring dormice for five years .
7 However , tiger attacks on people have caused problems , especially in the forests of the Sundarbans , where aggressive tigers have been killing people for hundreds of years .
8 no not we , you I 'm asking Mr you have been doing estimates for four or five years have you ?
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