German, often in constructions about a state or process. Common examples include es brennt ("there is a fire", literally "it burns"), es zieht ("there is a draft", literally "it draws") and es klopft ("there is a knock at the door", literally "it knocks"), as well as the whimsical es weihnachtet sehr ("it is very Christmassy", literally "it is Christmas-ing hard"). Many statements asserting existence also use an impersonal form. Often the equivalent sentences in English start with there.Es gibtThere isEs kamenThere came Celtic languages The Celtic languages also possess impersonal verbal forms though their use is usually translated into English by forms such as 'one sees' (Welsh: gwelir), 'one did' (Welsh: gwnaethpwyd), 'one is' (Irish: táthar) etc., in which he 'one' is taken to be an empty subject. For weather, personal verbs are used in Celtic languages, e.g. Welsh Mae hi'n bwrw eira 'it is snowing'. Verbs meaning existence may also be impersonal. Há livros. / Há um livro. (Portuguese) Hay libros. / Hay un libro. (Spanish) There are (some) books. / There is a book. However, sometimes there are intransitive verbs with more or less the same meaning: Existem livros. / Existe um livro. (Portuguese) Existen libros. / Existe un libro. (Spanish) (Some) books exist. / A book exists. Latin Latin has several impersonal verbs, most often seen in the third person singular. The real subject of the sentence will not be in the nominative case but is most often in the dative or accusative case. These verbs include: Decet – it becomes/suits; it is right/proper Libet – it pleases Licet – it is permitted/allowed Oportet – it is proper/fitting Placet – it is agreed/resolved Tai-Kadai Thai Impersonal verbs in Thai do not allow for an overt grammatical subject. The impersonal verbs occur only with transitive verbs. There is no allowance for the presence of a non-referential subject man 'it' in the case frame. In general, it is not allowed in formal speech, such as news reports. However, the presence of non-referential subject man can occur in the colloquial form. Subdivision into non-inception and inception subclasses can occur depending on whether the verb may occur with the path adverb khin 'up'. Constructed languages In the auxiliary language Interlingua, verbs are not conjugated by person. Impersonal verbs take the pronoun il:Il ha nivate heri. (Interlingua) In the planned auxiliary language Esperanto, where verbs also are not conjugated for person, impersonal