You can dig in there?

The word 'you' is the subject of the sentence.

The personal pronoun 'you' takes the place of the noun (or name) for the person spoken to.

The words 'can dig' is the verb consisting of the auxiliary verb 'can' (indicating ability) and the main verb 'dig'.

The words 'in there' is a prepositional phrase. The noun 'there' is the object of the preposition 'in'.