Is the word coming with us a correct grammar?

"Coming with us" is grammatically correct, but it needs a little more context to be a complete sentence.

Here's why:

* It's a participle phrase. It acts as an adjective, describing someone or something.

* It needs a subject. We need to know who or what is coming with us.

Here are some examples of how to use it correctly:

* The kids are coming with us. (The subject is "kids")

* Are you coming with us? (The subject is "you")

* The dog is coming with us to the park. (The subject is "dog")

Let me know if you'd like more examples!