Past Tense of “spell”
The past tense of spell is spelled; the past participle is spelled.
Why “spell” behaves this way
"Spell" entered English from Old French "espeller" (to explain or interpret letters), itself from a Germanic root related to "spell" in the older sense of a story, saying, or magical formula — the same root behind "gospel" (originally "good spell," or good news/story). The verb's modern sense, arranging letters correctly to form a word, only fully separated from its older sense of telling or reciting sometime in the late medieval period, though the two meanings share the identical historical root.
"Spelled"/"spelt" belongs to the same t-preterite dialect family as "smelled"/"smelt," "spilled"/"spilt," and "burned"/"burnt" — British English uses both, with "spelt" often slightly favored in casual speech, while American English strongly prefers "spelled" in virtually every context. Confusingly, "spelt" is also the name of an ancient variety of wheat, entirely unrelated in origin, which occasionally causes a moment of double-take for American readers encountering British recipes or agricultural writing that mentions "spelt" without context. The grain name comes from an entirely separate Germanic root connected to the idea of splitting or dividing, referring to how the grain's tough hull must be split away during processing, making the coincidence of identical spelling with the verb form purely accidental rather than etymologically connected.
The common confusion
Beyond the regional "spelled"/"spelt" split, "spell" carries a completely separate meaning — to relieve or take over from someone temporarily, as in "let me spell you at the wheel" — a nautical and labor-history usage from a different root than the letters sense, though it happens to share the identical modern spelling and conjugation by historical coincidence rather than genuine derivation. There's also the noun "spell" for a period of time or weather ("a cold spell," "a dizzy spell"), and yet another noun "spell" for a magical incantation, both of which trace to the older Germanic sense of a spoken formula or story — none of these noun senses affect verb conjugation, but a reader has to sort out which of four unrelated-feeling meanings is intended purely from context.
How it's actually used
"Spell" also appears in the idiomatic sense of clearly signaling or foretelling something, as in "this spells trouble" or "the numbers spell disaster for the company," a figurative extension of the literal "forming letters into words" sense that's now thoroughly standard in business and news writing, distinct from both the magical "spell" (a noun, unrelated conjugation) and the relief-shift sense. Notably, this foretelling sense almost always stays in the present tense even when describing a past situation in a news headline ("Layoffs Spell Trouble for Local Economy"), a stylistic convention that gives the sentence a more immediate, ongoing feel than the full past tense "spelled" would in the same slot.
Across the tense system
The passive voice appears constantly with the literal sense — "the word was spelled incorrectly in three places" — while the figurative "spells trouble" sense almost never appears in the passive, since it functions more like a linking construction ("this move spells disaster") than a true transitive action performed on an object.
Common real mistakes
The main real error is inconsistent switching between "spelled" and "spelt" within a single document, the same house-style issue found throughout this British t-preterite family. A second, distinct error is confusing the wheat variety "spelt" with the verb form in agricultural or nutrition writing, particularly in recipes translated between British and American editions where "spelt flour" sometimes gets miscorrected to the nonsensical "spelled flour" by an overzealous American copyeditor unfamiliar with the grain. A third error is confusing the relief-shift sense ("let me spell you at the wheel") with the ordinary spelling sense in nautical or trucking-industry writing, where a reader unfamiliar with the idiom might misread "he spelled her for two hours" as somehow referring to dictation rather than a shift change.
Examples
- She spelled the word correctly on her first try.
- The name had been spelled wrong on the certificate for years.
- He spelt the results out clearly in his report.
- This spells trouble for the entire department.
- The numbers have spelled disaster for the company all quarter.
- She offered to spell him for an hour on the long drive.
Memory trick
Keep the geography rule from the rest of this t-preterite family: "spelled" is the safe, universal choice, "spelt" is the distinctly British option — and remember that "spelt" the ancient grain has nothing to do with either, a pure spelling coincidence.