Example sentences of "have [vb pp] [prep] long period " in BNC.

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1 This state of affairs has resulted in long periods of civil war beginning soon after independence .
2 Women who were currently taking the pill or who had stopped taking it in the last 12 months had a significantly lower rate of endometriosis than those who had stopped for longer periods .
3 Whatever benefits were conferred by the phenothiazines , they gave little help to patients who were suffering from excessive mood swings or who had entered into long periods of helpless depression .
4 To investigate our rhythms , some individuals have lived for long periods in underground caves , cut off from sunlight .
5 The vast majority of these fish I have kept over long periods and know to be reliable , easy to keep and in the case of some , very long lived .
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