Is the phrase was already sent grammatically correct?

The phrase "was already sent" is grammatically correct, but it needs more context to be a complete sentence.

Here's why:

* "Was already sent" is a past participle phrase acting as the predicate of the sentence.

* It needs a subject to complete the thought. For example:

* The email was already sent.

* The package was already sent.

Let me know if you'd like to see more examples or have another phrase you'd like to check!