While walking the dog,you were careless and it got loose and was hit by a car这里walking是现在分词做伴随状语吗?用现在分词做伴随状语需要什么条件吗?而且补全时为什么要用you are 而不是 you were

while we were walking yesterday afternoon.the bell rang. _____ on a clear day,far from the city crowds,the mountains give him a senA：If walking B：Walking C：While walking D：When one is walking While I was walking in the street,I met Liu Dehua.转化为I met Liu Dehua while I was walking in the street.while换when, While the boy was walking down the street,the UFO landed,对While the boy was walking down the street提问 while the boy was walking down the street,the UFO landed同义句4种 while the boy was walking down the street,the UFO landed ( ) the boy was walking down the street,the UFO lended. while还是when while walking walking the dog ,you were careless and it got loose and was hit by a car ____ across the railway ,a train hit it.A While walkingB Walking slowlyC As it was walkingD While the sheep was walking 选择填空 1 That old man___he___something wrong before.A says；was B says;have done C Do;go D Will;go2 While I ___along the street,I___my old friend,John.A walkde;was meeting B was walking;has C was walking;had met D was walking;met 3 My sister__ while Tom saw the UFO,he was walking down the street with his friends有一处有错, The walking in the street,a terrible car accident happened,resulting in three deaths. A While walking B Walk C Walking D When I was walking eg：while walking the dog 为状语从句的省略 所以,while后面都加ieg：while walking the dog 为状语从句的省略 所以,while后面都加ing形式? Do you like walking down the street?同义句 do you know the meaning of a walking dictionary i do not like the (-------)(think) of walking home alone While walking the dog,you were careless and it got loose为什么 不是 got it loose