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Please tell me if the following sentences have the same meaning or if there is any difference between them.

  1. I can't do this task.
  2. I didn't finish this task.
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up vote 5 down vote accepted

I didn't finish this task

means you did only part of the task, not all of it.

I can't do this task

either means the task is too difficult for you or there is some reason for you not to want to do it even though you are told to.

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@loy: Thanks for your comment – sri Jan 19 '11 at 6:50
To be nitpicky, "I didn't finish this task" doesn't strictly mean that he did part of it. Maybe he didn't even start it. – o0'. Jan 19 '11 at 14:06

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