Is this sentence you have sent no messages from the morning grammatically correct?

The sentence "You have sent no messages from the morning" is grammatically correct but awkward. It's better to rephrase it for clarity. Here are a few options:

More natural phrasing:

* You haven't sent any messages since this morning.

* You haven't sent any messages since morning.

* There have been no messages from you since this morning.

The original sentence is grammatically correct because it uses proper verb conjugation ("have sent") and follows a basic subject-verb-object structure. However, it's a bit clumsy and could be interpreted in multiple ways. The alternative phrasings are clearer and more concise.