Someone saw him picking up a gun.
Someone saw him picking up a gun.
Explanation
Given sentence is in Past simple tense and it is in active voice, we need to change it into passive voice.
Rule :
Subject + (was / were) + V3 + Optional Agents.
Given sentence is in Past simple tense and it is in active voice, we need to change it into passive voice.
Rule :
Subject + (was / were) + V3 + Optional Agents.