1: I fed my neighbour's cat three days. 2: She listened five hours. 3: They paid the mortgage two decades. 4: He pestered her five days. 5: I read [a book] three hours. I don't like any of the above without for. But I've no problem with... 5: I've lived here twenty years. 6: We stayed six weeks. 7: They waited two hours. 8: He slept eight hours. More @Wikipedia
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