This document discusses discourse modes and syntax. It describes dichotomies in language such as oral versus written, unplanned versus planned, informal versus formal, contextualized versus decontextualized, and BICS versus CALP. It analyzes features that distinguish planned and unplanned language, such as clausal organization, topic-comment structures, parallelism, and repair. The document also covers identifying involvement versus detachment in speech and writing and distinguishing BICS and CALP in language learners.