Two developments in 20th-century grammar are discussed, focusing on aspects that may be useful in training teachers of English as a Second Language (ESL). The two developments are (1) the large descriptive grammars based on usage surveys, which give a systematic and detailed presentation of facts of usage, and (2) procedures for analyzing a…

This paper focuses on the mechanism by which the successful learner acquires a second language. The author postulates a core language, the common core of the speaker's native and target languages, and states that the second language becomes an extension of this common core. Whatever language-specific features are added while acquiring the second…