Future Perfect - haben oder sein?
Is there any way that will help me know which verbs use "haben" and which "sein"? Any clues at all?
Hi. Unless I'm mistaken, the situation with the future perfect is the same as with the present perfect - i.e. there are some verbs that take sein in both constructions.
The best clarification I've seen was given by Detlef Fehrer on a long thread a while back:
the general rule is to use "sein" for (intransitive) verbs that contain movement or change of state
It's important that the verbs be intransitive, i.e. have no direct object.
That's because the basic feeling about the use of sein is that something happened (moved, changed, occurred) but there's no object mentioned. There was just the pure action or event itself - "he flew, she escaped, I ran, we died, it all happened". Plus the special cases sein, bleiben & werden.
It's also worth taking a look at that thread for the long lists of possible sein verbs, and the excellent points made by PeterPan173079 about how the auxiliary verb can also vary depending on the meaning and context.
BTW: Reflexive verbs are always conjugated with haben since they always have a direct object.
Like these examples:
Ich werde gebadet haben - I will have bathed
Ich werde mich erinnern - I will have remembered
Ich werde gegessen haben - I will have eaten
Okay, I get it - "mich" the important word which indicates that it is reflexive.
Die vollendete Zukunft wird genauso gebildet wie das Perfekt.
Hello Susan, for a great explanation from a native German speaker who knows the grammar rules very well and also speaks great English, I'd like to recommend you her You tube channel Deutsch fur Euch. I am sure it will be of great help.