Edited by Sven Leuckert and Teresa Pham, Non-Canonical English Syntax provides a timely and stimulating reassessment of one of the most fundamental questions in English syntax: what counts as canonical, and why do speakers so frequently depart from canonical patterns? Rather than treating non-canonical constructions as peripheral irregularities, the contributors argue that they constitute systematic, communicatively motivated and historically stable components of English grammar. Drawing on historical linguistics, corpus linguistics, register studies, psycholinguistics, World Englishes, learner language and English as a Lingua Franca, the volume presents perhaps the broadest empirical treatment of non-canonical syntax currently available.

The central contribution of the volume lies in its challenge to the apparently straightforward opposition between canonical and non-canonical syntax. Canonicality is often implicitly associated with grammaticality, frequency, structural simplicity, or processing preference, while non-canonicality tends to be understood as deviation from an assumed norm. The chapters collected here demonstrate that these dimensions do not necessarily coincide. A construction may be infrequent but highly systematic, structurally marked but pragmatically well motivated, or non-canonical in one register or historical period while being relatively unremarkable in another. The volume therefore encourages readers to ask not simply whether a construction is canonical, but in what sense, in which context and relative to which baseline it is canonical. This shift in perspective is particularly valuable because it places variation and markedness at the centre of the analysis rather than treating them as marginal phenomena.

The opening chapter, ‘Introduction: New perspectives on non-canonical English syntax’ (pp. 1–13), outlines the central aims of the volume and argues that canonicality should be understood as a gradient and context-dependent notion rather than a fixed grammatical property. The editors emphasize that non-canonical constructions reveal important interactions among syntax, discourse, cognition and language change.

Chapter 2, ‘Talking about (non-)canonicity: A study of linguistic terminology’ (pp. 14–40), complements this introduction by examining the terminology itself. Sven Leuckert and Sofia Rüdiger demonstrate that the notions of canonical and non-canonical have been employed differently across linguistic traditions, depending on whether canonicality is defined in terms of structural simplicity, frequency, cognitive preference or theoretical assumptions. Rather than proposing a single definition, they advocate a flexible conceptual framework that successfully accommodates these competing perspectives. This terminological discussion is particularly useful because it makes explicit assumptions that are often left implicit in syntactic descriptions. In this respect, the chapter provides a conceptual foundation for the empirical studies that follow.

The remaining chapters are organized into three thematic parts dealing respectively with historical English, register variation and non-native varieties. Taken together, they offer a recurring insight: constructions that appear exceptional from one perspective often prove systematic once discourse function, communicative setting or language change is taken into account.

Marianne Hundt’s ‘Trying to hit a moving target: (Non-)canonical word order in the history of English’ (pp. 43–60) opens the historical part by arguing that canonical word order itself is historically unstable. The chapter reviews functional, generative, sociolinguistic and usage-based explanations for the transition from relatively flexible Old English word order to the rigid SVO syntax of Present-Day English, demonstrating increasing convergence among these approaches. The chapter is particularly important for the volume’s general argument because it shows that what may appear to be the canonical word order of English is itself the outcome of historical change. Canonicality, therefore, cannot be treated as an ahistorical property of the language.

In ‘Full-verb inversion in the history of English: Continuation or emergence of a non-canonical word order?’ (pp. 61–88), Gea Dreschler investigates whether present-day inversion represents the continuation of earlier patterns or the emergence of a distinct construction. Quantitative corpus evidence suggests that inversion survived the loss of V2 because it continued to fulfil discourse functions unavailable through ordinary SVO order. The chapter thus illustrates how a formally marked pattern may persist precisely because it continues to serve a communicative function.

Claudia Lange’s ‘There’s thieves in the house: Existential there-constructions in Late Modern English’ (pp. 89–110) similarly demonstrates that agreement variation reflects stable interactions among syntax, semantics and information structure rather than grammatical deficiency. Existential there therefore emerges as a robust discourse strategy rather than as an exceptional construction.

One of the highlights of the volume is Louise Mycock and Sharon Glaas’s ‘’Tis goodly language this, what would it mean? Demonstrative ProTags in the history of English’ (pp. 111–36). The chapter examines the history of British English demonstrative ProTags, clause-final demonstratives such as that in That looks very impressive, that and this in It’s good quality, this. The authors demonstrate that these constructions possess remarkably stable discourse-pragmatic properties despite their low frequency, functioning primarily to express speaker stance and evaluation rather than as ordinary right dislocations. Particularly illuminating is the diachronic finding that, although the preferred demonstrative shifts from this to that in Modern British English, the construction’s discourse-pragmatic function remains essentially unchanged. This is an especially revealing example of the volume’s broader argument: low frequency does not imply grammatical marginality, and diachronic change in formal realization need not entail a corresponding change in discourse function.

The discussion also invites fruitful comparison with Japanese. Japanese constructions involving n da, sentence-final particles and clause-final demonstratives lexicalize distinctions that remain only partially overt in English. Compare the English ProTag construction That looks impressive, that with Japanese examples such as Umai n da na, kore (‘This really is good, indeed’) and Umai na, kore (‘So this is good’). In the former, n da presents the proposition as an explanatory discourse object, na expresses speaker evaluation and interpersonal alignment, and the clause-final kore re-anchors the proposition within the discourse. By contrast, the latter lacks n da and is more naturally interpreted as a colloquial right-dislocation construction. Such comparisons suggest that English and Japanese organize discourse around similar interactions between propositional interpretation and speaker stance, although Japanese realizes these distinctions much more explicitly through morphosyntactic marking. English ProTags may therefore represent one manifestation of a broader typology of right-peripheral stance-marking constructions.

This comparison also points to a broader typological question that emerges from the volume. If apparently non-canonical constructions are frequently motivated by discourse-pragmatic functions, then their formal realization may vary considerably across languages while their communicative functions may be comparable. A systematic cross-linguistic investigation of such constructions could therefore help distinguish properties that are specific to English from more general principles governing the syntax–discourse interface. The ProTag chapter is particularly suggestive in this respect because it demonstrates how a construction that appears marginal from a frequency-based perspective can provide important evidence about the organization of speaker stance in grammar.

Heidrun Dorgeloh and Anja Wanner introduce the second part in ‘Different ways of saying different things: Non-canonical syntax in registers of English’ (pp. 139–56). They argue convincingly that non-canonical syntax is fundamentally register-sensitive, distinguishing carefully among register, genre and style while emphasizing that different registers frequently encode different communicative purposes rather than merely different linguistic forms. This perspective is important because it prevents the analyst from treating a construction as inherently non-canonical without considering the communicative environment in which it occurs.

In ‘The President wide awake at 3:14 AM tweeting about CNN: Informational non-canonical reduced structures in TV news broadcasts’ (pp. 157–82), Douglas Biber, Stacey Wizner and Randi Reppen show that verbless informational units function as complete discourse structures because they exploit the multimodal context and communicative conventions of television news. The chapter demonstrates convincingly that these reduced structures are systematic register-specific adaptations rather than incomplete sentences. The analysis also illustrates why syntactic description cannot always be separated from the communicative medium in which language is produced and interpreted.

Teresa Pham’s ‘What was it about it that you loved? Clefts in evaluative language’ (pp. 183–208) illustrates how cleft constructions simultaneously organize explanation, stance and information structure, showing that formally marked constructions become communicatively optimal in evaluative discourse. The chapter thus reinforces the idea that markedness at the level of syntactic form may correspond to functional efficiency at the level of discourse.

Christine Günther concludes the second part with ‘Cognitive complexity and non-canonicity: Zooming in on particle placement’ (pp. 209–34). Experimental evidence demonstrates that split particle constructions do not necessarily impose greater processing costs than canonical alternatives, challenging the common assumption that structural markedness directly corresponds to cognitive complexity. This finding is particularly significant for the volume as a whole because it shows that intuitions about markedness and complexity require independent empirical testing.

Devyani Sharma’s ‘Multicultural communicative situations: Non-canonical syntax in non-native Englishes’ (pp. 237–51) provides an excellent conceptual introduction to the third part of the volume by distinguishing several kinds of non-canonicity arising from information structure, multilingual communication and language contact. The chapter broadens the scope of the edited collection by showing that canonicality cannot be defined solely with reference to an idealized native-speaker variety. Once English is considered as a global language used in multilingual settings, the notion of a single canonical grammar becomes increasingly difficult to maintain.

Sandra Götz and Kathrin Kircili’s ‘Non-canonical syntax in South Asian varieties of English: A corpus-based study on the introductory-it pattern’ (pp. 252–79) demonstrates that introductory-it constructions are primarily motivated by information structure and sentence complexity rather than by regional differences.

Kathrin Kircili’s ‘Adverbial fronting phenomena in German learner language’ (pp. 280–306) argues that sentence-initial adverbials reflect discourse organization more than negative transfer, while Theresa Neumaier and Sven Leuckert’s ‘Non-canonical syntax in English as a lingua franca: Minus-plurals between language contact and emergent grammar’ (pp. 307–30) shows that apparently non-standard plural patterns constitute systematic adaptations shaped by multilingual communication.

Collectively, these chapters make an important contribution to the study of English variation. They demonstrate that what counts as non-canonical may depend not only on the structure of a construction but also on the linguistic background of its users, the communicative setting and the norms against which it is evaluated. Historical variation shows that canonicality changes over time, register variation shows that it changes across communicative contexts, and non-native varieties show that it changes across communities and patterns of language use. The three perspectives together provide a strong empirical basis for treating canonicality as a relational rather than absolute notion.

The concluding chapter, ‘Synopsis: Concepts, approaches, and methods in non-canonical syntax’ (pp. 331–6), successfully integrates the theoretical and methodological themes developed throughout the collection. Particularly welcome is the editors’ emphasis on future directions, including cross-linguistic comparison, computational approaches, AI-generated language and automated identification of non-canonical constructions. These directions are especially promising because the increasing availability of large corpora and computational tools makes it possible to investigate patterns of variation on a scale that was previously difficult to achieve.

Three broader conclusions emerge from the volume. First, canonicality is best regarded as a gradient and context-dependent notion rather than as an absolute grammatical distinction. Second, many constructions traditionally viewed as peripheral occupy central positions at the interfaces between syntax, discourse, cognition and language change. Third, the integration of historical corpora, register analysis, psycholinguistic experimentation and multilingual data demonstrates the considerable benefits of methodological pluralism.

The latter point deserves particular emphasis. One of the volume’s major strengths is that it does not attempt to explain non-canonicality through a single theoretical or methodological framework. Corpus frequencies can reveal distributional patterns, historical data can demonstrate the development of constructions, register analysis can identify communicative conditioning and experimental evidence can test assumptions about processing complexity. Multilingual and learner data, in turn, make it possible to examine how grammatical patterns are shaped by language contact and communicative needs. The combination of these approaches produces a more nuanced understanding than any single method could provide. In this sense, the volume is not merely a collection of studies on particular constructions; further, it also offers a methodological model for investigating grammatical variation more generally.

The collection’s principal strength lies in its remarkable coherence despite the diversity of empirical topics. Rather than presenting isolated case studies, the chapters repeatedly converge on the conclusion that non-canonical constructions are functionally motivated responses to communicative demands. The editors also succeed in balancing frequency-based and theory-based perspectives without privileging either approach.

If one minor reservation may be expressed, it concerns the limited amount of explicit cross-linguistic comparison. Although the volume successfully demonstrates the systematicity of non-canonical constructions within English, occasional reference to comparable phenomena in typologically different languages would have further clarified which properties are language-specific and which may reflect more general principles of discourse organization. This observation should not, however, be taken as a criticism of the individual chapters, whose primary goal is understandably the description of English itself. Rather, it points toward a promising direction for future research suggested by the volume as a whole.

Overall, Non-Canonical English Syntax is an impressive achievement. It successfully redefines non-canonical syntax not as a collection of grammatical exceptions but as an indispensable window onto the interaction of grammatical structure, discourse, cognition, register and language change. The volume demonstrates that constructions traditionally regarded as peripheral can become theoretically central once their distribution, communicative functions, historical development and cognitive properties are examined carefully. It also shows that canonicality is not a single property residing in grammatical form, but a relationship between linguistic structure, frequency, context, communicative purpose and the analytical perspective adopted by the researcher.

The volume will be welcomed not only by specialists in English syntax but also by researchers working in historical linguistics, corpus linguistics, discourse analysis, World Englishes, grammaticalization and linguistic theory more generally. More broadly, it will be of interest to anyone concerned with the relationship between grammatical form and actual language use. By bringing together diverse empirical approaches while maintaining a clear conceptual focus, Leuckert and Pham have produced a volume that should stimulate further research on non-canonical syntax and, more generally, on how grammatical categories are shaped by the interaction of structure, discourse, cognition and variation.