What is the correct grammar for following You leaving early today?

The grammatically correct way to phrase "You leaving early today?" depends on what you're trying to convey. Here are a few options:

If you're asking a question:

* Are you leaving early today? (Most common and natural)

* Will you be leaving early today? (If you're asking about a future event)

* Do you plan on leaving early today? (If you're asking about their intention)

If you're making a statement:

* You are leaving early today.

* You're leaving early today. (Informal)

If you're expressing surprise or concern:

* You're leaving early today? (This implies surprise, with a slight rising inflection)

* Are you sure you have to leave early today? (This implies concern)

The best choice depends on the context and your intended meaning.