The conversation between human and AI assistant.
[|Human|] Go through the passage and edit it so that every sentence follows a similar verb tense (e.g. present, past, or future).
[|AI|] John starts the process of cleaning the kitchen. He scrubs the countertops and sprays down the cabinets. Then he sweeps the floor and mops it.
[|Human|] 
Go through the passage and edit it so that every sentence follows a similar verb tense (e.g. present, past, or future).