Example sentences of "these have [not/n't] [adv] been [verb] " in BNC.

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1 One of these has not yet been published , so people are unable to satisfy themselves that its design is appropriate .
2 The cause of these has not yet been found , but they can be very serious and there is a chance that he will be mentally handicapped .
3 I mean these have n't just been put here , they 've been there for a long time !
4 If these have not yet been given then maintain those in the flight plan .
5 ‘ Many of these have not yet been registered as charities and we will be asking local authorities to check deeds , take legal advice and , if appropriate , register these pieces of land with the Charity Commission to give them some long-term protection . ’
6 However , while the theoretical analyses yield precise predictions , these have not always been found in empirical analysis .
7 Our research confirms that , to the degree that new entry-level social service jobs have been created , these have not often been accompanied by the development of opportunities for career advancement for the incumbents .
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