Editing Null-subject language (section)

==Impersonal constructions==
{{Unreferenced section|date=May 2018}}
{{Main|Impersonal verb}}
In some cases ([[impersonal verb|impersonal constructions]]), a proposition has no [[referent]] at all. Pro-drop languages deal naturally with these, whereas many non-pro-drop languages such as English and French must fill in the [[syntax|syntactic]] gap by inserting a [[dummy pronoun]]. "''*Rains''" is not a correct sentence; a dummy "it" must be added: "''It rains''"; in French "''Il pleut''". In most Romance languages, however, "''Rains''" can be a sentence: Spanish "''Llueve''", Italian "''Piove''", Catalan "''Plou''", Portuguese "''Chove''", Romanian "''Plouă''", etc. [[Uralic language|Uralic]] and [[Slavic languages]] also show this trait: [[Finnish language|Finnish]] "''Sataa''", [[Hungarian language|Hungarian]] "''Esik''"; [[Polish language|Polish]] "''Pada''".

There are [[constructed languages]] that are not pro-drop but do not require this syntactic gap to be filled. For example, in [[Esperanto]], "He made the cake" would translate as ''Li faris la kukon'' (never ''*Faris la kukon''), but ''It rained yesterday'' would be ''Pluvis hieraŭ'' (not ''*Ĝi pluvis hieraŭ'').