This is a conceptual paper based on the existing literature related to three famous language learning theories; Audio-lingual Method, Communicative method and the hypotheses of Stephen D. Krashen. These three schools of thought are not usually seen as similar or it is not common to find much literature regarding these theories having any common traits. The individual criticism on each of these theories focuses on many of their individual aspects but not on similarities among these three. The researchers however, after studying these theories closely, have been able to extract some striking similarities in spite of all the commonly known differences. The aim of this paper is to invite more focus and more research on similarities shared by these apparently independent schools of thought and consequently exploit the maximum fruits of these powerful theories. The findings suggest that the multiple similarities among the three schools of thought under study can jointly be named as one very vividly common trait: stress on the communicative skills involving listening and speaking to be the key towards successful language learning.