The shopkeeper lowered the prices.
The shopkeeper lowered the prices.
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.