He has been skating for five hours.(用since改写句子) He has been skating___ ___ ___ ___

He has been skating for five hours.(用since改写句子) He has been skating___ ___ ___ ___ He has been skating since.的同义句He has been skating_____ _____ _____He has been skating since two hours ago.的同义句He has been skating_____ _____ _____ 还有一个噢,How long has he been skating?也是答语三种哦 . Next is Sam ,and he has been skating for four hours Alison has been skating for five hours. How long has he been skating?答语三种,一个是for 一个是since（两种） Sam has been skating for four hours.改为否定句 The skating marathon has been going for five hours now,and several skaters are still skating The skating marathon has been going for five hours.改为同义句 The skating marathon_________five hours__________. How long has alison been skating?How long has alison been skating?She's been skating for five hours.How long did sam skate?he skated for four hours.我要解释的是那四句 因为本人英语差 所以请你们告诉哈我 回答了还有加分 How long __ Leo__ yesterday? He was very tired when he was back from the skating club.A did; skate B has ; been skating 选择哪一个,我认为A是 正确的,但答案是B.为什么? he`s been skating for four hours 改为否定句 1.She has been skating for three years.(就划线部分提问）————————has she been skating?2.have been,this university,for,I,working,in,3 years.(连词成句)3.TOM从10岁就一直在集邮.TON--------------stamps since he was ten y long has he been away? How long did you sleep last night?什么意识还有When did you start class today?how long have you been in class today?How long has Alison been skating?she's been skating for five hours.How long did Sam skate?He skated for four hours.是什么意 The,has,skating,marathon,been,for,going,hours,five,now.(连词成句) The skating marathon has been going for give hours now.求翻译这里的going是什么意思？ Alison was the first one to start and has been skating for the whole five hours