Past Tense of “mow”
The past tense of mow is mowed; the past participle is mown.
Why “mow” behaves this way
"Mow" descends from Old English "mawan," a strong verb originally used for cutting grass or grain with a scythe. The strong ablaut system has largely eroded from everyday use, leaving a fully regular simple past, "mowed," while the old strong-verb participle "mown" survives specifically in more literary or descriptive contexts. Before gas-powered mowers existed, "mowing" described skilled seasonal farm labor performed with a scythe by hand, and much of the word's older literary and poetic usage — "new-mown hay," harvest imagery in pastoral poetry — reflects that pre-industrial agricultural association rather than the suburban lawn-care context most speakers associate with it today.
"Mown" today appears almost entirely as a descriptive adjective rather than in ordinary verb phrases — "freshly mown hay," "a neatly mown lawn" — giving it a slightly more poetic, pastoral quality compared to the plainer, more functional "mowed," which dominates everyday conversation about yard work ("I mowed the lawn yesterday").
The common confusion
There's a mild pronunciation trap rather than a spelling one: "mown" rhymes with "own," not with "down" or "cow," which occasionally trips up readers encountering the word for the first time in print without hearing it spoken. Children learning to read aloud are especially prone to this mistake, since the "ow" spelling elsewhere in English much more often signals the "cow" sound than the "own" sound. Pairing "mown" with "grown" and "shown" in a reader's mind, all rhyming with "own," helps fix the correct pronunciation quickly.
How it's actually used
"Mow down," a distinct figurative idiom meaning to kill or defeat many people or things in a sweeping, indiscriminate way, extends the literal image of cutting down grass in wide swaths into a much darker or more competitive metaphor, and it uses either "mowed down" or "mown down" without a clear preference between the two. Sports commentary has also picked up "mow down" as a lighter metaphor for a team overwhelming a weaker opponent, stripped of any violent undertone and used almost playfully. Landscaping and lawn-care businesses, meanwhile, keep the verb almost entirely in its literal sense, since their marketing rarely needs the figurative extension at all.
Across the tense system
Modern usage genuinely splits by register: "mowed" dominates as the past participle in everyday spoken and written English ("I've mowed the lawn already"), while "mown" survives mainly in fixed descriptive phrases and more formal or literary writing, a split similar to "sawed/sawn" and "hewed/hewn." Landscaping invoices and neighborhood chat almost never reach for "mown" at all, reserving it instead for poetry, fiction, and nostalgic description of rural scenes.
Common real mistakes
Using "mown" as a finite past-tense verb ("he mown the lawn yesterday" instead of "he mowed the lawn yesterday") is a genuine error, since "mown" functions today almost exclusively as an adjective or participle after "has/have/had," not as a standalone simple past. A second, subtler mistake is dropping "mown" altogether and defaulting to "mowed" even in set literary phrases where "mown" is genuinely the more idiomatic choice — "newly mowed hay" isn't wrong, but it reads noticeably less natural to most readers than the traditional "newly mown hay." Some learners also confuse "mow" with the unrelated interjection "meow" purely by spelling resemblance, though the two share no linguistic connection whatsoever.
Examples
- He mowed the lawn before the guests arrived.
- The scent of freshly mown grass filled the summer air.
- She has mowed this same field every August for a decade.
- The tractor mowed through the tall grass along the fence line.
- A neatly mown lawn stretched out behind the old farmhouse.
- They mowed down the weeds before planting new flowers.
- The soldiers were mown down before reaching the ridge, according to the account.
Memory trick
Save "mown" for description — freshly mown hay, a neatly mown lawn — and use plain "mowed" for ordinary action verbs, the same everyday/literary split you'll find with "sawed" versus "sawn." If in doubt about the verb form, "mowed" is always safe. Picture a poet standing in a hayfield versus a neighbor pushing a lawnmower on Saturday morning — the same verb, but two very different registers.