摘要：As it is mentioned by Chomsky, languages are ruled by a set of universal grammars which are accessible before the age of puberty. In this paper, an attempt is made to find out various theories regarding universal principles underlying the language used by L2 learners. In this case, there is not much information at hand about the universal constraints used by L2 learners. To this goal, a review of the literature regarding universal grammar (UG) application is utilized to investigate the accessibility to UG in L2 learners. There are four views toward L2 UG accessibility; 1. The Full Transfer Full Access Hypothesis; 2. The Minimal Trees Hypothesis; 3. The Valueless Features Hypothesis; and 4. Full Access (without Transfer). The flow writing backers that there are basic slips shared by numerous EFL learners which make scientists consider whether UG standards are pertinent to a dialect after the pubescence. In like manner, there are a few requirements discernible in the creation of grown-up EFL learners which may be taken as proof for the operation of Universal Grammar. Then again, it is not clear how EFL learners have admittance to general classifications which is the subject of thought in this paper.
