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

I was___(cut )hair when the UFO landed I was taking a walk when the UFO landed.改成同义I ——when the UFO landed. 英语翻译the boy was walking the street when the UFO landed(对was walking the street 提问）___ ___ the boy ___ when the UFO 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.(改为同义句) the boy was walking down the street when the UFO landed 神马意思 the boy was waiking down the street when the UFO landed I was taking a shower in the bathroom when the UFO landed 的意思 They were walking along the road when the UFO landed.(改为一般疑问句） I was walking down the street when a UFO landed right in front of me l was walking down the street when a ufo landed right in frout of me 这个句子可以这样调换位置吗?the boy was walking down the street when the UFO landed可以改成when the UFO landed the boy was walking down the street My mother was in the kitchen when the UFO was landed应不应该用was ,直接用landed 可以不? Did you see the UFO?When it ____(landed,was landing),I was in the barber' shop!填那个, 关于英语主句从句的问题While the boy was walking down the street,the UFO landed.The boy was walking down the street when the UFO landed.这两句中,哪些是主句,哪些是从句,说明理由 i was walking down the street when a UFO landed right in front of meright在这里面是什么意思啊? 当男孩沿着街走时,UFO降落了 这句话的翻译“当男孩沿着街走时,UFO降落了”这句话的翻译一定要是The boy was walking down the street when the UFO landed.吗?不能是When the UFO landed ,the boy was walking down the 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