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Many Bantu languages have a system of complex verbal constructions, where several verbal forms combine to describe a single event. Typically, these consist of an auxiliary and a main verb, and often tense-aspect marking and subject agreement is found on both forms. In this paper we develop a parsing-based, Dynamic Syntax analysis of complex verbal constructions in three Bantu languages -Swahili, Rangi and siSwati -and show how concepts of structural underspecification, accumulation of information and contextual update can be harnessed to explain the use of several verbal forms for the building of one semantic structure. At the heart of the analysis is the idea that structure established early in the parse can be 're-built' from subsequent lexical input as long as incrementality and information growth are respected. This correctly predicts the accumulation of tense-aspect information and the fact that multiple subject markers have to be interpreted identically, while maintaining a uniform pronominal analysis of Bantu subject markers. From a comparative perspective, we show that complex verbal constructions result from processes of grammaticalisation, and, especially with reference to the extensive auxiliary system of siSwati, we sketch different processes of lexical change underlying the stages of the grammaticalisation process.

Bantu inversion constructions include locative inversion, patient inversion (also called subject–object reversal), semantic locative inversion and instrument inversion. The constructions show a high level of cross-linguistic variation, but also a core of invariant shared morphosyntactic and information structural properties. These include: that the preverbal position is filled by a non-agent NP triggering verbal agreement, that the agent follows the verb obligatorily, that object marking is disallowed, and that the preverbal NP is more topical, and the postverbal NP more focal. While previous analyses have tended to concentrate on one inversion type, the present paper develops a uniform analysis of Bantu inversion constructions. Adopting a Dynamic Syntax perspective, we show how the constructions share basic aspects of structure building and semantic representation. In our analysis, cross-linguistic differences in the distribution of inversion constructions result from unrelated parameters of variation, as well as from thematic constraints related to the thematic hierarchy. With some modification, the analysis can also be extended to passives.

While global patterns of human genetic diversity are increasingly well characterized, the diversity of human languages remains less systematically described. Here, we outline the Grambank database. With over 400,000 data points and 2400 languages, Grambank is the largest comparative grammatical database available. The comprehensiveness of Grambank allows us to quantify the relative effects of genealogical inheritance and geographic proximity on the structural diversity of the world’s languages, evaluate constraints on linguistic diversity, and identify the world’s most unusual languages. An analysis of the consequences of language loss reveals that the reduction in diversity will be strikingly uneven across the major linguistic regions of the world. Without sustained efforts to document and revitalize endangered languages, our linguistic window into human history, cognition, and culture will be seriously fragmented.

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While global patterns of human genetic diversity are increasingly well characterized, the diversity of human languages remains less systematically described. Here we outline the Grambank database. With over 400,000 data points and 2,400 languages, Grambank is the largest comparative grammatical database available. The comprehensiveness of Grambank allows us to quantify the relative effects of genealogical inheritance and geographic proximity on the structural diversity of the world's languages, evaluate constraints on linguistic diversity, and identify the world's most unusual languages. An analysis of the consequences of language loss reveals that the reduction in diversity will be strikingly uneven across the major linguistic regions of the world. Without sustained efforts to document and revitalize endangered languages, our linguistic window into human history, cognition and culture will be seriously fragmented.

The Tanzanian Bantu language Rangi exhibits a comparatively and typologically unusual word order alternation in the future tense. Whilst declarative main clauses exhibit post-verbal auxiliary placement, the auxiliary appears pre-verbally in whquestions, sentential negation, relative clauses, cleft constructions and subordinate clauses. This paper examines this alternation from the perspective of Dynamic Syntax (Cann et al., 2005;Kempson et al., 2001). Dynamic Syntax (DS) is a parsingoriented framework which aims to capture the way in which meaning is established incrementally as a result of lexical input encountered in context. The paper presents a unified analysis of this construction found in Rangi, locating it within the wider workings of the language. It shows that this seemingly idiosyncratic constituent order is in fact predictable on the basis of a general constraint operative in the DS framework which prohibits the co-occurrence of more than one unfixed node, thereby also confirming the claim of Dynamic Syntax to constitute a grammar framework rather than merely a parsing device.

This paper explores a connection between Romance and Greek on the one hand, and Bantu on the other. More specifically, we look at auxiliary placement in Rangi and clitic placement in Tobler Mussafia languages, with a special emphasis on Cypriot Greek, and argue that a common explanation for their distribution can be found once a move into a dynamic framework is made. Rangi exhibits an unusual word order alternation in auxiliary constructions under which the position of the auxiliary appears to be sensitive to an element appearing at the left periphery of the clause. A similar sensitivity to a left-peripheral element can be seen to regulate clitic placement in Cypriot Greek (and generally in the so-called Tobler Mussafia clitic languages). The paper presents a parsing-oriented account of these two phenomena in the Dynamic Syntax framework, arguing that the similarities in syntactic distribution are the result of the encoding in the lexicon of processing strategies that were potentially pragmatic preferences in earlier stages of the respective languages. The account thus leans on the role played by the lexical entries for auxiliary and clitic forms, as well as the assumption that underspecification is inherent in the process of establishing meaning in context. The account is further supplemented by possible pathways of diachronic change that could have given rise to the systems found in present day varieties.