11. He referred to Noam Chomsky's generative grammar for help. 12. Linguists working within generative grammar often view such trees as a primary object of study. 13. Chomsky's work, originally known as transformational-generative grammar , continues to be the dominant force in linguistics. 14. More recently, the language has been the subject of work in the generative grammar tradition. 15. Since bracketing represents a hierarchical tree, it is associated to some extent with generative grammar . 16. In the early 20th century, Ferdinand de Saussure distinguished between the notions of generative grammar . 17. But early generative grammar was a rococo device. 18. Most frameworks outside of generative grammar continue to assume the traditional NP analysis of noun phrases. 19. Working within generative grammar , he wrote several important books about the formal analysis of polysynthetic languages. 20. In generative grammar , a reflexive pronoun is an binding domains for reflexive pronouns, according to their structure.