Example sentences of "have [to-vb] at [adv] a " in BNC.

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1 On the Saturdays I would scrub the kitchen floor , black and polish the kitchen grate , and polish the knives , so that my mother could have a little rest on her return from several hours cleaning , sometimes having to walk at least a mile to her regular place of work .
2 But before he 's even fit enough to be flown home , doctors say he 'll have to spend at least a fortnight in hospital .
3 The probability of a quark gaining sufficient energy is so low that one is likely to have to wait at least a million million million million million years ( 1 followed by thirty zeros ) .
4 She had to get her hands back on the reins , had to re-establish at least a degree of control over her own life .
5 That was an essential b eventually that was taken away , but the building trade still believed if a building firm wanted men , they had to have at least a thirty two hour guarantee , which is at present still in operation .
6 In particular consider time limits — both for enacting and for advising , perhaps the performers have to spend at least a minute improvising before they can request advice .
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