Is with grammatically correct?

"With" is a preposition, and prepositions are not grammatically correct on their own. You need to use "with" in a phrase or sentence.

For example:

* With the dog.

* I went with my friends.

* He ate his lunch with a fork.

Can you please provide me with the full sentence or phrase you're asking about? I can then tell you if it's grammatically correct. 😊