i've been skating for five hours=i skated for five hours

i've been skating for five hours=i skated for five hours i 've been skating for five hours 为什么要用ing形式啊 I skated for 4 hours . I have been skating for 4 hours. I ha 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 I skated for four hours与I have been skating for four hours的区 关于八年级英语的一个问题.i‘ve been skating for five hours.和.she’s been s Alison has been skating for five hours. she's been skating for five hours 为什么is been for都不用翻译 A--So you've___skating for B--- I've been skating for five h I've been collecting them for five They have been skating for five hours 同义句 They have been ska The,has,skating,marathon,been,for,going,hours,five,now.(连词成句