Example sentences of "been at it [adj] [noun] " in BNC.

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1 She 's been at it all afternoon . ’
2 If he did n't understand something , he was reluctant to stand up and ask , instead he 'd worry it out himself , sometimes I reckoned he 'd been at it all night .
3 ‘ Sorry , but I 've been at it all day . ’
4 bloody hell , that must of been hard work that , they must of been at it all day
5 They can never win — they have been at it 23 years .
6 Been at it three week now , so
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