Which sentences are the correct to ask someone to speak using a lower voice or a louder voice?
Can you please speak lower?
Can you please speak louder ?
Can you please low your voice?
Can you please loud your voice ?
phrase-requestword-request
Which sentences are the correct to ask someone to speak using a lower voice or a louder voice?
Can you please speak lower?
Can you please speak louder ?
Can you please low your voice?
Can you please loud your voice ?
Best Answer
Maryam's comment pretty much covers it, although I'll add a few more examples:
Feel free to add "please", and/or "Could you ..." to make it more polite. You can also say "Would you ..." to make it more of a demand:
Note: I don't know why you can say, "Could you speak up?" but you can't say, "Could you speak down?" It's just one of those strange English quirks.