This MA thesis explores the means of expressing interpersonal function in Czech and English academic texts. These expressions are found at various levels (e.g. lexical, grammatical and lexico-grammatical) and our classification takes into account both formal and functional point of view. From the various approaches to meadiscourse we have chosen the integrative approach subsuming both interpersonal and textual features of metadiscouse. However, this thesis focuses mainly on the interpersonal features. In the first part of the thesis, a detailed analysis of four academic texts was performed in order to get a range of expressions for the controlling search. The aim of the controlling search was to verify the findings from the detailed analysis and to find out to what extent the selected expressions were represented in a larger set of data. For this search we gathered twenty academic articles dealing with linguistics, ten per each language. Despite the different language types, Czech and English use similar means to express interpersonal features of metadiscourse. The greatest difference was found in the category of relational markers and self-mentions, other categories displayed relatively similar frequencies. Key words: metadiscourse, interpersonal function, Czech, English, academic register,...

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This diploma thesis maps the diachronic tendencies in the frequency and functions of it-cleft sentences in two sub-registers of academic prose, humanities and natural sciences, from 1800 to 2019. Biber and Gray (2016) showed changes in grammatical complexity in academic writing, namely the shift between phrasal and clausal grammatical complexity and explicitness, which motivated the hypothesis of this thesis, i.e. that the frequency of it-clefts is expected to decrease in the course of 20th century in both sub-registers with the development being faster and more salient in natural sciences. General description presents the syntactic and semantic properties of it-clefts together with discussion about FSP and the distinction between new and given information, as the objective of the thesis is also to study the development of the functional types of clefts. The empirical part analyses a corpus of 170 academic texts, covering the time period under study. It is divided into sections based on time periods displaying similar features concerning the frequency of it-clefts in natural sciences and humanities. The analysis confirms that the expected decrease in the frequency of it-clefts is clearly notable in the case of natural sciences, while in humanities the frequency of it-clefts in individual texts...