Grammar question

Is "Thank you" a complete sentence with the "I" implied? Is the sentence subject ever implied except in an imperative sentence

Quote:

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Originally Posted by Garyshatrick

Is "Thank you" a complete sentence with the "I" implied? I would say so.
Is the sentence subject ever implied except in an imperative sentence? Certainly in oral English it often is.
Makes no difference to me. Don't know.

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2006