Past Tense of “fall”
The past tense of fall is fell; the past participle is fallen.
Why “fall” behaves this way
"Fall" comes from Old English "feallan," a class-7 reduplicating strong verb in the same family as "hold," "grow," and "know" — verbs whose past tense historically doubled the root syllable in prehistoric Germanic before simplifying to the single "e"-vowel pattern seen today. The core sense, descending under gravity, has stayed remarkably constant across well over a thousand years.
The American use of "fall" as the name for the autumn season (short for the older phrase "fall of the leaf") is actually the newer of two competing terms — the word "autumn," borrowed from French, arrived first and remains the dominant term in British English, while American English preserved and shortened the native, more descriptive "fall of the leaf" instead.
The common confusion
The real confusion is mainly "fell" versus "fallen" after a helping verb ("prices have fell" instead of "prices have fallen"), a common slip in casual speech, plus a genuine and completely separate confusion between the verb "fall" and the unrelated regular verb "fail," which sound somewhat alike but share no history and have entirely different meanings. A further genuine subtlety involves the phrasal verb 'fall for,' which can mean either to be deceived by a trick or to develop romantic feelings for someone, two very different meanings distinguished entirely by context rather than by any difference in the verb's own fell/fallen conjugation.
How it's actually used
"Fall" appears in a huge range of idioms — "fall in love," "fall behind," "fall through" (fail to happen), "fall back on" (rely on as an alternative) — every one of which keeps the identical fell/fallen pattern regardless of how abstract the meaning has become from the original physical sense of dropping downward. 'Fall' also names the season in American English as a plain noun requiring no conjugation at all, a nominal use entirely distinct from, though historically descended from, the ordinary verb describing downward motion. One more idiom, 'fall short,' describes failing to meet a standard or expectation, a metaphor extended from the physical image of not quite reaching a target distance, and it keeps the identical fell/fallen conjugation of every other sense of this verb.
Across the tense system
The participle "fallen" also functions as a standalone adjective with strong emotional and historical weight, as in "our fallen soldiers," a solemn usage referring to the dead that has become a fixed, almost ceremonial phrase distinct from the ordinary grammatical perfect tense. The compound noun 'fall guy,' describing someone unfairly blamed for a mistake, and the technical aviation and skydiving term 'free fall,' describing unimpeded descent under gravity, both borrow the base verb's imagery for a fixed label that never needs conjugating on its own, since one is a noun and the other a set technical term.
Common real mistakes
Using "fell" after a helping verb instead of "fallen" ("prices have fell") is the most common tense error. A separate, unrelated but frequent confusion is mixing up "fall" with the regular verb "fail" in casual speech, since the two share a similar sound but describe entirely different concepts — one physical descent, the other a failure to succeed. A separate, much rarer error is applying 'fell' where 'felled' is actually required, since 'felled' is the regular past tense of an entirely different, transitive verb meaning to cut down a tree, distinct from the intransitive irregular verb 'fall' discussed throughout this entry.
Examples
- She fell asleep during the movie.
- Home prices have fallen for three straight months.
- Leaves fall from the trees every autumn.
- They were falling behind schedule on the project.
- Had the government fallen sooner, the crisis might have ended differently.
- The empire finally fell after centuries of decline.
- Let's fall back on our original plan.
- Temperatures are falling rapidly overnight.
Memory trick
Group "fall" with "hold" and "know": fell/fallen mirrors held (though held drops the -en) and knew/known in the broader reduplicating-verb family, though fall's own -ell/-allen shape is distinctive enough to memorize on its own. If "has fell" ever slips out, swap in "has fallen" by remembering the rhyme with "stolen" and "chosen," both of which also end in that same participial "-en."