The document summarizes several theories of second language acquisition, including: 1. Chomsky's theory of an innate Language Acquisition Device that guides children in learning the underlying rules of language. 2. Krashen's five hypotheses of language acquisition - the Acquisition-Learning Hypothesis, the Monitor Hypothesis, the Natural Order Hypothesis, the Input Hypothesis, and the Affective Filter Hypothesis. 3. The Interlanguage Theory which posits that learners develop a systematic series of intermediate language systems as they progress towards acquiring the target language.

1. Theories of second-language learning Based on Barry McLaughlin: Thoeries of Second-language Learning (Edward Arnold, 1987) Lightbown and Spada: How Languages are learned (OUP,1993)

13. The Acquisition-Learning Hypothesis

33. filter up down INPUT LAD Language acquisition device Acquired competence The operation of the “affective filter”, Krashen, 1982

43. Some linguistic devices used to express temporality in the interlanguage of second-language learners

44. 1, Temporal adverbials, yesterday, last night, etc. 2. Locative adverbials, in Vietnam, at work, etc. 3. Calendar expressions, January, Tuesday, etc.

49. Discussion again on the points that we started with, p. 111,