This paper attempts to introduce and explain the famous Three Concentric Circles proposed by Kachru, namely, the Inner Circle, the Outer Circle and the Expanding Circle. Based on Kachru's theory, the paper proceeds to discuss four fallacies in EFL and ESL contexts, which are (1) English learners in the Outer and Expanding Circles learn English essentially to communicate with people from the Inner Circle; (2) a native speaker model is the only appropriate model for all learners of English; (3) all native speakers of English can go to teach in the Outer and Expanding circles; (4) English is a tool for understanding and teaching American or British cultural values.