Example sentences of "[modal v] [vb infin] been doing [prep] " in BNC.

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1 And what 's impressive is they 're doing research that we should have been doing for years !
2 As we become more successful in delivering health care in the community , we discover things that we should have been doing in the past but have not done .
3 He estimated that the car must have been doing at least 18 miles per hour on the curve where it overturned .
4 Choose one of the four and try to work out what he or she must have been doing at each stage of the carnival .
5 You have got to train that person which you could have been doing for years and
6 The drawings show some common occupations for women in 1880 and what their great-grand-daughters may have been doing in 1980 .
7 The crowd seemed to be getting a little impatient just before the goal ( as I 'm sure we all were listening to it on the radio ) but can you imagine what the scum crowd would ahve been doing to their team if they had n't scored within twenty minutes ?
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