“…Therefore, different theories have been suggested regarding the acquisition of relative clause constructions. The acquisition of relative clauses, which were previously studied theoretically and typologically, still remains a mystery (Andrews, 2007;Chomsky, 1965;Comrie, 1989;Diessel, 2004;Downing, 1978;Duarte et al, 2015;Frank and Ernst, 2018;Gibson, 1998;* Dr. Öğretim Üyesi, Syracuse Üniversitesi, Dil Bilim Bölümü, eserordem@gmail.com Hamilton, 1995;Kayne, 1994;Keenan and Comrie, 1977;O'Grady, 2011;Thornton, 2016;Wu, Kaiser and Vasishth, 2018;Wiechmann, 2015). Larsen-Freeman's (1997) complexity theory can also show why certain structures are harder to process, understand and produce.…”