I saw an old man k_____ down by a car yesterday.

I saw an old man k_____ down by a car yesterday. 是“I saw an old man fall down”还是“I saw an old man fell down” The old man was knocked down by a car [ ]he saw it run towar “I saw an old lady knock down by a motorbike while she was w 问大家一个关于英语语法的问题..老师写了一个句子（I saw an old man knocked down by a Linda saw an old man ______down by a _______ bus. An old man drives his car down the street.. who saw an old man ______by a taxi I saw an old man _____(lie) on the around when I walked past I saw an old man ____(lie)on the ground when I walked past. I saw an old man ___ in the entrance hall when I came to the run an old man down,翻译