1 原句的主语不能随意改动,当然应当是some flowers
2 如果find的宾语是人称代词,后面可能出现的形式有:
find sb.doing sth
find sb.to be
但是没有 find sb.do sth (因为 do不能作宾补),所以i find him cook.是个错句.
如果非要改的话,宾语变主语,动词变be found,主语 + by 放在句尾,其余部分位置不变.
I found him to be a thief.
He was found to be a thief (by me).
供参考.