1 He has been training for six months.
2 Diana has not been swimming for ten minutes.
3 We have been skating since eleven o'clock.
4 How long has Alex been playing? (for two hours)
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1 He has been training for six months.
2 Diana has not been swimming for ten minutes.
3 We have been skating since eleven o'clock.
4 How long has Alex been playing? (for two hours)