On first language acquisition,there are three different theories: behaviorism,nativism and interactionism,all of which also presents the developing process of first language acquisition.The paper probes into the comparison of these three theories,centering on the problem: Is language ability acquired from its interaction with society or innate? In fact,it cannot be given a totally definite answer,for a lot of factors accounts for children's language development,such as prenatal and postnatal,physiological and subjective and environmental ones,etc.With the research development on one topic,other factors will be found.
