A regular verb is any verb whose conjugation follows the typical grammatical inflections of the language it belongs to. A verb that cannot be conjugate like this is called an irregular verb. All natural languages, to different extents, have a number of irregular verbs. Auxiliary languages usually have a single regular pattern for all verbs (as well as other parts of speech) as a matter of design. Other constructed languages need not show such regularity, especially if they are designed to look similar to natural ones.