In this article we focus PEUL's (Programa de Estudos sobre o Uso da Língua) contribution to Brazilian Sociolinguistics, and, specifically, to variationist studies. We start by providing an overview of Rio de Janeiro variable phenomena. Then we show the spread of variation domain and emphasize the systematicity and regularity of a linguistic variable -the formal parallelism -on phenomena of language variation and change, and show some patterns of correlation between language and social structure.
Abstractln thls artlcle I discuss two forma of posposed causal clauses 1n oral discourse: Y porque ]C ("Y because X") and Y paU8a porque X. (;"Y pause because X"). By means of quantitative analysls, I demonstrate that these forms cannot be considered structural alternatives for expresslng causal relation ln alI environments. Although elther one may occur ln some contexts, afterthought clauses share d1fferent features and play a spec1flc role ln the process of verbal lnteraction.
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