I skated for 4 hours . I have been skating for 4 hours. I ha

I skated for 4 hours . I have been skating for 4 hours. I ha I skated for four hours与I have been skating for four hours的区 i've been skating for five hours=i skated for five hours -How long did you skate?-I skated for two hours. I have been over my homework for three hours I have been down for two hours.改为同义句 i 've been skating for five hours 为什么要用ing形式啊 I have been down for two hours.句型转换 I have been down ---- -- 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 关于八年级英语的一个问题.i‘ve been skating for five hours.和.she’s been s sleep的用法I have sleeping for 9 hours.I have slept for 9 hours I have been waiting for you for two hours.(对划线部分提问)