I saw an old bike on show last Sunday 改为被动语态

I saw an old bike on show last Sunday 改为被动语态 I saw an old man _____(lie) on the around when I walked past i saw an old man fall over on the street y( ) I ( )an old friend on the street three days agI ( )an old friend on the street three days ago.A.saw B.see C.sees I saw an old man___(to cross;crossing) the road I saw an old woman-------- (walk) outside the school gate I saw an old man and the dog________（正在街上散步的） 填什么?I saw an old man and the dog _____(正在街上散步的）on the road I saw an old man ____(lie)on the ground when I walked past.这里为什么要用lie的过去分词 On the bus I saw an old woman ________ I thought was your grandmother.who 还是 whom 我选whom,但是答案是who.为什么?还是…… I saw an old woman were getting in her rice on the ground outside her house.这句话有错吗?为什么? I saw an accident ___(happen) on the road yesterday. Yesterday on my way home ,I saw an a_____thing 是“I saw an old man fall down”还是“I saw an old man fell down”已看到摔倒的全过程 改错 Once an old man saw a bag on his way to home. we saw an old man ___(get)on a bus just now .I,around,an,man,when,was,down,fall,walking,the,saw,station,I,old I saw an old man k_____ down by a car yesterday.时态是什么 DOING? Sam usedn't to go to school on an old bike这里的on可以换成with吗