Language/Volapuk/Grammar/future

The future tense is formed by removing -ön from the infinitive, then by prefixing o- to the beginning and adding the necessary personal pronoun to the end:

• Okömobs odelo ‘we shall/will come tomorrow’

To express a future event which had not yet taken place in the past, simply add ö- to the relevant verb:

• Äsagof, das ökömof ‘She said that she would come’
• Ävilons, das öremobs toodi ‘They wanted us to buy the car’

Source: http://www.xn--volapk-7ya.com/quick-look-at-volapuk.html