My mother was in the kitchen when the UFO was landed

My mother was in the kitchen when the UFO was landed when got my home ,my mother was cooking in the kitchen为什么一定要 I was taking a shower in the bathroom when the UFO landed 的意 1 -what was he doing when the UFO landed? l was walking down the street when a ufo landed right in fro I was walking down the street when a UFO landed right in fro 英语翻译the boy was walking the street when the UFO landed(对was I was doing my homework,my mother was cooking in the kitchen When the UFO(landed/was landing),the dog (slept/was sleeping my mother was in the kitchen 为什么要加一个was? Did you see the UFO?When it ____(landed,was landing),I was i the boy was walking down the street when the UFO landed同一句