completely satisfied. However, in this tree the EPP is not satisfied as there is no subject present in the TP position. In order to satisfy the EPP we must move the DP John into spec TP, to allow for the TP subject to be filled By moving the DP we are altering the sentence making it John will Run. The EPP will now be satisfied as the DP John is now in the subject position of the TP. See also Extended Projection Principle Constituent X-bar Theory Phrase Structure Rules Subcategorization References Grammar Noam Chomsky