Grammars that used the X-bar schema are phrase structure grammar .
In many phrase structure grammars - for instance those that build on the X-bar schema - the finite verb is the head of the finite verb phrase ( FVP ) and as such , it is the head of the entire sentence , and in dependency grammars , the finite verb is the root of the entire clause and is thus the most prominent structural unit in the clause , e.g .
Finite verb