was the boy walking down the street when the UFO landed 回答 Yes he wasthe girl wasn't shopping when the alien got outwhile the girl was shopping ,the alien didn't get out没有写全....the boy was walking down the street when the UFO landed改为一般疑问句，并回答while the boy was walking down the down the street ，the UFO landed（改为一般疑问句，并回答）the girl was shopping when the alien got out（改否定句）while the girl was shopping ，the alien got out（改否定句）谢谢....Did the UFO land while the boy was walking down the down the street Yes it did意思是the boy was walking down the street when the UFO landed和while the boy was walking down the down the street ，the UFO landed改是一样嘞啊？改为一般疑问句....一样的？我英语差哈，求求你讲一哈不一样while the boy was walking down the down the street ，the UFO landed强调the UFO landed而the boy was walking down the street when the UFO landed强调the boy was walking down the street