The skating marathon has been going for five hours.改为同义句 The

The skating marathon has been going for five hours.改为同义句 The 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 Alison has been skating for five hours. Sam has been skating for four hours.改为否定句 the skating marathon,go,for eight hours,now 连词成句 They have been skating for five hours 同义句 They have been ska 英语改同义句1)My brother has been in the army for five years.Five he`s been skating for four hours 改为否定句 They have been practicing the guitar for two hours.(改为同义句)