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Condolence is a noun. Therefore it has no tense. It has singular and plural.
That is the correct spelling of "condolences" (sympathy for a loss, usually a death).Condolences is correct.
You have to drop a scrabble set and then write down all of the upward facing letters, this will be your condolence
Surely whatever you feel is in keeping with expressing condolence.
condolence