I was looking over a test preparation book, and I found out that "Congratulations to the winner of the big contest" is in fact a complete sentence. This led me to question whether or not "congratulations" itself can serve as a sentence. After all, it is just a simpler way to state the former.

  • 1
    It's a sentence the same way "Hello!" is a sentence. – Hot Licks May 31 '17 at 16:18
  • It entirely depends on what definition of "sentence" you choose to use. There is no definitive answer. – Colin Fine May 31 '17 at 16:29

"Sentence" doesn't have a fixed formal definition: it may mean anything from 1 "a pragmatically meaningful utterance" at one extreme through 2 "a formally complete clause" to 3 "any string of written text lying between an initial capital letter and a full stop, question mark or exclamation point".


Congratulations! and
Congratulations to the winner of the big contest.

would qualify under the first and third definitions, but not the second.

  • I always considered this to be vocative use. – Davo May 31 '17 at 17:14

An often used diagnostic for the category of a constituent is coordination with "and". Generally, but with some exceptions, only constituents of the same grammatical category can be coordinated with "and". It's easy to think of examples where "Congratulations" is coordinated with an imperative sentence -- "Congratulations, and have a great time at Niagara Falls!"

So I classify it as an imperative sentence. Probably, it's short for "Accept my congratulations!"

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