D, knowledge of a language enables you to combine words to form phrases, and phrases to form sentences, to be able to produce new sentences never spoken before and to understand sentences never heard Defore. Noam Chomsky calls this ability ---the part of the creative aspect of language useD. knowledge of a language enables you to combine words to form phrases, and phrases to form sentences, to be able to produce new sentences never spoken before and to understand sentences never heard before. Noam Chomsky calls this ability ---the part of the creative aspect of language use