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If I worked on something yesterday but it was not finished, should I use "I didn't finish it yet" or "I haven't finished it yet"?

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Per Difference between 'haven't …yet' and 'didn't… yet', the presence of "yet" at the end of both these alternatives makes a huge difference to how "acceptable" they are. So unless you think it's somehow important to your question about didn't finish/haven't finished, you might consider editing the word out. –  FumbleFingers Nov 2 '12 at 22:46

3 Answers 3

up vote 16 down vote accepted
  • If you worked on it yesterday, stopped yesterday before finishing then, and don't want to say anything else about whether you will or can continue or not, but more likely that you are done for good (like a one-time test), then:

    I didn't finish it.

  • If you worked on it yesterday, stopped yesterday before finishing, and want to imply that you are still planning on working on it, then:

    I haven't finished it.

    or with a bit more emphasis on the expectation of continuing

    I haven't finished it yet.

  • The sentence

    *I didn't finish it yet.

sounds off, because "didn't" isn't particularly continuous, but "yet' implies an expectation or possibility, and so also a continuing act.

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This is a very clear and precise explanaton, Thanks Mitch. –  Sarawut Positwinyu May 11 '11 at 3:58
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"I didn't finish it yet" is very odd in UK English. I have the impression that it is rather more normal in US English, but I don't know: can anybody comment on this? –  Colin Fine May 11 '11 at 11:27
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In US (spoken) English, didn't is used much more frequently that havent't done. Also, in US English you almost always say I don't have rather than I haven't got. –  Phonon May 11 '11 at 16:28
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@Colin Fine - Not normal in US English either (at least to this USAite.) –  MT_Head Jun 9 '11 at 0:20

The sentence "I did not finish it yet" is incorrect because of mismatched tense. The phrase did not finish is in the past tense, while the word yet indicates that the task is ongoing (present tense), which creates a contradiction.

The sentence "I have not finished it yet" is correct because the phrase have not finished is in the present tense and can be safely used with "yet". In fact, the word "yet" is not strictly necessary. "I have not finished" would carry the same meaning.

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Now i know the nuance of yet, Thank you. –  Sarawut Positwinyu May 11 '11 at 4:02
    
I believe this explanation is slightly misleading. You can say I did not start it yet. It's not the past tense/present tense conflict that is wrong here, but the expectation that the task is not ongoing. –  Peter Shor May 11 '11 at 10:45
    
Strictly speaking "I have not finished it" is in the Present Perfect tense: en.wikipedia.org/wiki/Present_perfect . Present would be "I finish" or "I do not finish". –  Lunivore May 11 '11 at 10:46

“I haven't finished it yet” is definitely a much more natural-sounding version but “I didn't finish it yet” might also be acceptable (though a bit more awkward).

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Thank you Will :) –  Sarawut Positwinyu May 11 '11 at 3:21
    
It's certainly true your first version is more natural-sounding, but as @e.James indicates above, the second version is a bit worse than "awkward". Most native speakers would say it's just plain "wrong" - even if they couldn't explain exactly why as eloquently and succinctly as @e.James does. –  FumbleFingers May 11 '11 at 17:34
    
Anecdotally, the second sounds completely natural to this native speaker. –  recursive May 11 '11 at 18:27

protected by RegDwigнt Apr 29 '12 at 12:32

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