Stole и stolen зависит от контекста
1 will have written
2 how long will have you been studying
3 will have completed
4 will have left
5 will have finished
1. Of course, you may have it your own way, but if I … (were) you, I
should refuse this proposal.
2. You are too straightforward. I am sure
that if you … (were) older you would understand me.
3. I am so sorry he
is not coming. I should be very happy if he … (came).
4. If you …
( meet) him, tell him about it.
5. If you had warned us we …. (would not have
come) so early. Now we shall have to wait for more than an hour.