have I found the lost child 还是 have I find the lost child

have I found the lost child 还是 have I find the lost child The police still have I found the lost child,but they’re doing all they .A.can B.may C.must D.should (四川 20’)这题选 A 我明白.但是题干中警察让我找孩子为什么用过去分词作宾补而不用have I find the lost child.毕竟找是宾语I 的主动地动作吗?