Future time clauses (perfect)
(after, as soon as, by the time, immediately, in case, once, on condition that, the minute, the moment, until, when)
- After these words in a future time clause, we use the present perfect to talk about things that are complete in the future. So:
- I'll let you know as soon as I've got the results back.
- So not I'll let you know as soon as I will have got the results back.