The,has,skating,marathon,been,for,going,hours,five,now.(连词成句

The,has,skating,marathon,been,for,going,hours,five,now.(连词成句 The skating marathon has been going for five hours now中going The skating marathon has been going for give hours now. The skating marathon has been going for five hours now,and s The skating marathon has been going for five hours.改为同义句 The the skating marathon,go,for eight hours,now 连词成句 Alison has been skating for five hours. Sam has been skating for four hours.改为否定句 They have been skating for five hours 同义句 They have been ska my was marathon first this skating 连词成句 i've been skating for five hours=i skated for five hours 现在完成时态的 I've been skating for five hours 这句是什么时态,与I've skate