Conjugate Verbs


  • Language: Ido
  • Created: 1907
  • Alternate names:
  • Language code: cido
  • Language family: Conlang
  • Script: Latin script


Ido is a constructed language, derived from Reformed Esperanto, created to be a universal second language for speakers of diverse backgrounds. Ido was specifically designed to be grammatically, orthographically, and lexicographically regular, and above all easy to learn and use. In this sense, Ido is classified as a constructed international auxiliary language. It is the most successful of many Esperanto derivatives, called Esperantidoj.

The verb

Verbs in Ido, as in Esperanto, do not conjugate depending on person, number or gender. For the word "to be," Ido allows either "esas" or "es" in the present tense; however, the full forms must be used for the past tense "esis" and future tense "esos."