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Hi all. I have a question.

I.........................my mind and .............home for the holidays after all.

a-was changing /am not going
b-changed / don't go
c- have changed / won't be going
d-change / haven't gone
e-will have changed / didn't go


It is obvious that the expected choice is C. However, E also seems possible to me by means of the usage of "will have V3" as possibility; I mean "must have V3". To me, the speaker may be a forgetful person, or a drunk or somebody else like that. As a result, he may have forgotten what he did on that period of time in the past. Isn't E is also possible by means of "pragmatics" or the context?
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Nope. You'd need a future instead of didn't go in order for e) to work, say:

By tomorrow, moody as I am, I will have probably changed my mind and won't go/won't be going home for the holidays after all.
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It is the use of the first person that requires the recruitment of far-fetched ideas like drunkenness or forgetfulness to support choice E. Besides, the choice in the second clause would not work with the rest of the sentence.

What you suggest would be more comfortably said in the third person, like this:

He will have changed his mind and not (have) gone home for the holidays after all.

In AmE we would more likely say:

He has probably changed his mind and not gone home for the holidays after all.

because we don't use the will of probability very often in everyday conversation.

CJ
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Comments  
well i think it's

c- have changed / won't be going
 Marius Hancu's reply was promoted to an answer.
Marius HancuNope. You'd need a future instead of didn't go in order for e) to work, say:

By tomorrow, moody as I am, I will have probably changed my mind and won't go/won't be going home for the holidays after all.
What I say is not in that sense. I did not mean the usage of "will" in the sense of "future referring". I mean "will" as a modal of strong possibilityEmotion: crying; will have V3 = must have V3
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Sorry, I don't get you. Others might.

Something related to possibility/probability in the past, but including must have (and not will):

He must have changed his mind, because he didn't go home for holidays after all.
 CalifJim's reply was promoted to an answer.