What you need to form the ‚second future‘ (Futur II, vollendete Zukunft) is the finite form of ‚werden‘ (to become), the second participle of the verb, and the helping verb sein/haben (to be/to have). Importantly, you need to be able to conjugate ‘werden’ appropriately, and you need to know how to form the second participle of a verb. This will allow you to construct sentences such as the following:

Ich werde gegessen haben. I will have eaten.
Du wirst gelesen haben. You will have read.
Er/sie/es wird gelernt haben You will have learned.
Wir werden gegangen sein We will have gone/walked.
Ihr werdet geboren sein. You will have been born.
Sie/Sie werden gestorben sein. You will have died.

When do you use ‘haben’ (have) and when ‘sein’ (be)?

‘sein’ is mostly used for intransitive verbs that denote a change of state or place (gehen, einschlafen, aufwachen,…), and ‘haben‘ anywhere else.

How do you form the second participle again…?

  • weak verbs: ge…t
  • strong verbs: ge…en
  • mind that many strong and mixed verbs have a different stem in the second participle! (e.g. gehen – gegangen, bringen – gebracht…)
  • verbs that end in –ieren are not prefixed; e.g. studieren – studiert (not *gestudiert)

When do you use this tense?

  • When you assume that something has finished (keyword frequently ‘schon’): Es wird schon gut gegangen sein (I’m sure it worked out fine)
  • When you assume that something will have finished by a certain time in the future: Ich werde meinen Aufsatz bis morgen Abend verbessert haben (I will have improved my essay by tomorrow evening)