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Can we use "would" instead of "will" in the future perfect tense?

Please explain it and give some examples.

marked as duplicate by Cascabel, Yosef Baskin, herisson, Andrew Leach Jul 4 '17 at 19:41

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  • 3
    If we said "I would have gone" instead of "I will have gone", would it still be the "future perfect tense"? Your question is not clear. It would be greatly improved by examples. – Peter Shor Jul 4 '17 at 15:16
  • There isn't any future tense in English, so there isn't any future perfect tense, either. Will is just another modal auxiliary verb, like would, may, might, shall, should, can, could, and must. All of them can refer to future time, just like will, and all of them can occur with infinitives without to, just like will. So, yes, you can. Rest easy. But find a better grammar text. The one that gave you the false information you based your question on is not reliable. Sorry. – John Lawler Jul 4 '17 at 16:29
  • @JohnLawler English makes future tenses and others by adding auxiliary verbs. – RShields Jul 4 '17 at 17:33
  • @RShields There must be an awful lot of tenses in English, then, because there are an awful lot of auxiliary constructions. The past tenses alone can run into the dozens. – John Lawler Jul 4 '17 at 22:36
  • @JohnLawler Welcome to English conjugation. (I speak some Chinese on the side and lemme tell you, Chinese conjugation is a breeze!) – RShields Jul 4 '17 at 23:55

The future perfect tense looks like

I will have gone.

Changing "will" to "would" makes

I would have gone.

which is actually conditional perfect tense.

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