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Future Perfect Tense

Hi! I'm very confused with the usage of the construction "to be tired" in its Future Perfect Tense form in the following sentence: By the end of the week I will be tired (have been tired/have got tired). Which variant is correct?
Thank you in advance.


  • DavidCrosbieDavidCrosbie ✭✭✭
    edited February 2019

    @npoluyan9, the problem is nothing to do with FUTURE.

    Tired is an ADJECTIVE. And it's much more common than the related VERB tire.

    Even when we want to express a PASSIVE meaning, we don't usually use be tired. Instead of saying

    He was tired by his journey

    we say

    He was tired from his journey or He was tired after his journey

    The meaning of the adjective includes the notion of RESULT, so there is no need to use PERFECT.

    • Instead of PAST PERFECT
      I had been tired
      we say
      I was tired

    • Instead of PRESENT PERFECT
      I have been tired
      we say
      I am tired

    • Instead of FUTURE PERFECT
      I will have been tired
      we say
      I will be tired

    The only reason I can think of for using PERFECT is when expressing DURATION;

    I had been tired since morning
    I have been tired since morning

    It would be a very unusual situation if you could say:

    But that will be at the end of an extremely busy day. It won't be a a good time to make such an important decision. You'll have been tired since morning.

    In the context that you describe, I think the only possible choice is

    I'll be tired

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