Transgressive (linguistics)
In linguistic morphology, a transgressive is a special form of verb. It expresses a concurrently proceeding or following action. It is considered to be a kind of infinitive, or participle. It is often used in Balto-Slavic languages. Syntactically it functions as an adverbial. Slavic languages. Czech. The transgressive ("transgresiv" or "přechodník") is a form of the verb in the Czech and Slovak languages. Nowadays it is used only occasionally for artistic purposes and in set phrases and idioms. Transgressives were still used quite widely in the literary language at the beginning of the 20th century. For example , Jaroslav Hašek's "The Good Soldier Švejk" contains many of them. The Czech language recognizes present and past transgressives (there are future transgressives as well). The present transgressive can express present or future action depending on the aspect of the verb from which it is derived. Slovak. In Slovak, only the present transgressive form exists, and it does not inflect for gender or number. Polish. In Polish, transgressives are usually called "adverbial participles" ("imiesłowy przysłówkowe") and inflect neither for gender nor for number. There are two kinds of such participles: anterior (only from perfective verbs) and contemporary (only from imperfective  verbs). The anterior participle (related to the Czech past transgressive) expresses an event earlier than the event described by the main clause, while the contemporary adverbial participle expresses an event simultaneous with the event described by the main clause. Nowadays, especially the anterior participle is unused in the spoken language and rare in the written language. The contemporary adverbial participle can be derived by adding the ending "-c" to the third-person plural present form of an imperfective verb (or by adding the ending "-ąc" to the present stem of an imperfective verb): The verb "być" "to be" is the  only exception – its contemporary adverbial participle is "będąc" and corresponds to its future form "będą" "[they] will be" rather than to its present form "są" "[they] are". The anterior adverbial participle can be derived by replacing of the ending "-ł" in the third-person singular masculine past form of a perfective verb with the suffix "-wszy" (after a vowel) or "-łszy" (after a consonant): Serbo-Croatian. In all varieties of Serbo-Croatian, the transgressive forms are called "verbal adverbs" ("glagolski prilozi", singular: "glagolski prilog"). They are common in literature and other written works, while in spoken language simple present or  past tense constructions are usually used instead. They are formed similarly to the Czech and Polish transgressives. Examples are given in Gaj's Latin alphabet and Ijekavian pronunciation. Examples. The present verbal adverb ("glagolski prilog sadašnji") is formed by adding the ending "-ći" to the third-person plural present form of an imperfective verb: The past verbal adverb ("glagolski prilog prošli") is formed by adding the ending "-vši" to the infinitive stem of a perfective verb: Some perfective verbs have irregular past verbal adverbs, for example "doći" "to come (perf.) > "došavši" "having come". The auxiliary verbs can be both  perfective and imperfective. The verb "biti" "to be" has the present verbal adverb "budući" and the past verbal adverb "bivši", and the verb "htjeti" "to want" has the present verbal adverb "htijući" or "hoteći" and the past verbal adverb "htjevši" or "hotjevši". The past verbal adverb can also be used to describe a way how something was done, for example for the verb "baciti" "to throw", the past verbal form "bacivši" can mean "by throwing", for example "počinio je samoubojstvo bacivši se sa zgrade" "he committed suicide by throwing himself off the building". Russian. In Russian, the transgressive (called "деепричастие ) is considered a participial form, which functions adverbially. It is common in written and spoken language. It indicates a secondary" action, performed concurrently with the primary action. Syntactically the transgressive is felt as relating to the "manner" of the primary action, as adverbs of manner do. Formation of the transgressives bears similarities to the transgressives of other Slavic languages. The transgressive can be formed from a perfective or an imperfective infinitive verb lemma. The imperfective transgressive can be in the present or past tense. The perfective transgressive is in the past. The transgressive has no other inflection (beyond the tense  inflection for the imperfectives). Examples. For some of the most frequent verb lemmata, formation of the transgressive exhibits some morphological variation and irregularity, with no simple rules: The above transgressive forms of "to be" can be combined with the passive participle to form periphrastic passive transgressives, though such usage is more rare. Baltic languages. Lithuanian and Latvian have multiple transgressive forms most of which are used very actively in all types of modern speech. Lithuanian. Lithuanian has the following transgressive forms: The gerund. The gerund (Lith. "pusdalyvis"), used with verbs in all tenses to render an action done by the  sentence subject simultaneously with the action of the main verb: Examples. The gerund is formed by removing the infinitive ending "-ti" and adding the suffix "-dam-", as well as endings marking gender and number: Adverbial participles. Two adverbial participles (Lith. "padalyvis") out of four (present adverbial participle and past simple adverbial participle), used with verbs in all tenses to render an action of which the sentence subject is not the agent and which takes place simultaneously with the action of the main verb (present adverbial) or before it (past simple adverbial): Examples. The adverbial participles are not conjugated and are  formed by removing the ending of the respective tense and adding the suffix "-ant(is)" (present tense) or "-us(is)" (past simple tense): Latvian. Latvian has the following transgressive forms: The "-dams" participle. The "-dams" participle (Latv. "divdabjis ar "-dams""), used with verbs in all tenses to render an action done by the sentence subject simultaneously with the action of the main verb: Examples. The "-dams" participle is formed by removing the infinitive ending "-t" and adding the suffix "-dam-", as well as endings marking gender and number: The "-ot" participle. The "-ot" participle (Latvian "divdabjis ar "-ot""), used with verbs in  all tenses to render an action which takes place simultaneously with the action of the main verb. Contrary to the similar form in Lithuanian, "-ot" participle can be used for secondary actions performed by the sentence subject as well (in many instances a speaker is free to choose between "-dams" and "-ot" participle): Examples. The adverbial participles are not conjugated and are formed by taking the stem of the present tense and adding the suffix "-ot" or "-oties" (for reflexive verbs).