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

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1 Opioid use is the top category , and individuals in this group may also have been using any of the drugs in the other five categories .
2 Barbiturates are the second hierarchical category , and individuals in this group may have been using any of the drugs in the four categories below , but not opioids .
3 The suddenness of the increased use of artillery in the third quarter of the fourteenth century is evidenced by the fact that when Gaston Fébus , vicomte of Béarn in the Pyrenees , had a network of fortifications constructed between 1365 and 1380 ( a period during which many castles were built in France ) he must have been building some of the last fortifications to take no account of artillery , which was very soon to compel important developments in the art of defence .
4 At this period the players must have been getting sick of the sight of each other , for just another few months and England were playing their first one-day games in the West Indies .
5 Alex 's strange position in the production must have been making all of the usual understudy agonies even worse .
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