When the UFO(landed/was landing),the dog (slept/was sleeping

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/09 12:14:13

When the UFO(landed/was landing),the dog (slept/was sleeping)
另有一题：When the reporter(arrived/was arriving),everybody(shouted/was shouting)这两题标准答案：第一题landed,was sleeping；第二题arrived,shouted.但我不明白为什么句式基本相同的这两题答案不同（第一题一个用一般过去,一个过去进行；第二题两个都是一般过去,为什么?）还有,这类题应该怎么判断所用时态?

一般来说,短暂性动作,也就是动作时间只持续一小段,我们使用过去时,比如你举得例子里的,land降落,在飞碟落地的那一刻,动作就结束了,不可持续.还有arrive到达,shout大喊；
而持续性动作,动作带有持续性,可持续很久,如：例子里的,sleep,我们使用过去进行时.

When the UFO(landed/was landing),the dog (slept/was sleeping Did you see the UFO?When it ____(landed,was landing),I was i I was sleeping when the UFO arrived 1 -what was he doing when the UFO landed? 英语翻译the boy was walking the street when the UFO landed(对was .I was sleeping last night when the UFO l_______. My mother was in the kitchen when the UFO was landed the boy was walking down the street when the UFO landed同一句 the boy was walking down the street when the UFO landed改为一般疑英语翻译The boy was walking down the street when the UFO landed. The boy was walking down the street when the UFO landed.(改为同 the boy was walking down the street when the UFO landed 神马意思