Good afternoon. I once writing an exercise I found an interesting example.

  1. I will send you the paper after I finish it.
  2. I will send you the paper after I have finished it.

I have learnt that we usually use Present Simple in subordinate clauses as in the first statement. But than I found another example. So is there any difference in meaning between these two sentences or both of them are interchangeble? Please, explain it to me.

  • 4
    Both are idiomatic and in everyday use. For all practical purposes they mean the same thing.
    – WS2
    Jan 16 '17 at 11:30
  • 1
    @WS2 is correct; however, one could argue that replacing "after" with "once" would sound more natural.
    – Dog Lover
    Mar 7 '17 at 22:11

As far as I understood both are correct. The main thing we should remember is to use right and appropriate time in each of its parts (according to clauses rules).

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