... five main hypotheses in his theory of second language acquisition. Among the five main hypotheses initiated by Krashen (1982), (the Acquisition-Learning hypothesis, the Monitor hypothesis, the ... hypothesis, the Monitor hypothesis, the Natural Order hypothesis, the Input hypothesis, and the Affective Filter hypothesis), the Input Hypothesis is seen as the corner-stone for the setting up ... The Comprehensible Input Hypothesis is obviously an attempt to explain how the learner acquires a second language. In other words, this hypothesis is an explanation of how second...