how long has Alison been skateing?与how long did Sam skate的区别

来源：学生作业帮编辑：搜搜考试网作业帮分类：英语作业时间：2024/05/09 18:37:48

how long has Alison been skateing?与how long did Sam skate的区别
how long has Alison been skateing?与how long did Sam skate?的区别.简易点.复制的绕道.

how long has Alison been skateing?艾莉森滑冰多久了?是以现在的时间为切入点看问题的,用了现在完成进行时,滑冰的动作现在还在进行着,有可能还要进行下去；而how long did Sam skate?当时艾莉森滑冰滑了多长时间?是对过去发生的动作的累计时间进行询问的,是纯粹的过去的客观事实,与现在无关,并且滑冰的动作已经结束.
再问：那一般怎么回答呢？
再答： how long has Alison been skateing?----->Alison has been skating for two hours.或For two hours. how long did Sam skate??----->Alison skated for two hours.或For two hours.

how long has Alison been skateing?与how long did Sam skate的区别 How long have you been skating?与How long did you skate?的区别 How long has alison been skating? How long have you been skating?How long did you skate?中文翻译的区 how long did you skate? how long did you skate today?和how long have you been skating 英语翻译How long did you skate today?How long have you been skat how long haveyoubeen和how long did you skate?什么区别? how long have you done与how long have you been的区别 how long have you been in与how long have been to的区别,还有how lon How long ( ) you ( A.did skate B.have been skating 在这可不可以选A? how long 与how ofter的区别