he was just walking past the entrance,when my friend returned home.请问这句话中为什么要用逗号隔开时间状语?

整理下列句子 rain/the building/it/walking/he/began to/just as/was/out of 排列顺序 1rain the building it walking he began to just as was out of . One afternoon just before Chrismas,a kind old man was walking in the street when he saw a little bo he was walking (slow)的正确形式 He was walking.He was slow.(合并句子) he was just walking past the entrance,when my friend returned home.请问这句话中为什么要用逗号隔开时间状语? He was often seen _________(talk)a walking the streat. 翻译He was walking up the drive towards the house, Mr Smith felt tired when he was walking He was walking ____ ____ street with a book. He was walking with quick ___.他快步走着 He was too tired to go on walking 同义句 just-Keep-walking是什么意思 I saw a man ( ) into the room just now用walk的适当形式是was walking还是walking He was caught ____the rain when he was walking in the street.为什么用in he was singing ()(和……同时)he was walking along the bank of the river He was happy just now.什么 意思 The same policeman was just walking slowly past the entrance中past the entrance是什么成分