I was shopping when I saw a car accident.改为一般疑问句

He was shopping when I saw.用was shopping提问 下面两个句子哪一个正确?I met Tom while I was shopping.I met Tom when I was shopping. I was doing some shopping ____ I saw my old friends yesterday afternoon (when/while/as) I was shopping when I saw a car accident.改为一般疑问句 扩号部分提问：When the accident happened,I was shopping I was doing some shopping ______the earthquake started that afternoon.填when 还是while 连词成句missing,week,cell,went,my,when,phone,shopping,I,was,going,last He often () me when I go shopping. when i finished _____ yesterday,it was 9 o'clock in the evening .A go shopping B go shop C going shopping D going shop I___ some shopping with my mother when I ran into Linda.为什么要填did,而不填was doing. The man was shopping when the alien got out 对was shopping 提问 1.过去进行时如何分辨did与was/were doing?2.单选：I _______ when he arrived.A was shopping B shopped C shopping D shops3.单选I ____ while he was playing the piano.A was shopping B shopped C shopping D shops4.填空what ______ you ____ wh when I was young? When i was thriteen 直接引语变间接引语She said:I was shopping when the UFO arrived.怎么变间接引语是变成She said that she was shopping when the UFO had arrived.还是She said that she was shopping when the UFO arrived.为什么? I ( )my wallet when I was shopping in the store.答案为什么选择must have dropped而不是ought to have dropped? I was a teacher when I was 英语题2道要原因1.He received a toy panda on his____(five)birthday2.I was doing some shopping when the building_____(start)to shake hard.