Past Tense of “saw”
The past tense of saw is sawed; the past participle is sawn/sawed.
Why “saw” behaves this way
"Saw" (the verb meaning to cut with a serrated blade, related to but grammatically distinct from "saw" as the irregular past tense of "see") is regular in the simple past ("sawed") but has a genuinely split participle: British English favors the irregular "sawn" ("freshly sawn timber"), while American English overwhelmingly prefers the regular "sawed" ("freshly sawed timber") for the same meaning, making this one of the clearer regional splits in English irregular-verb usage. Traditional Japanese pull-saws (as opposed to Western push-saws) are frequently discussed in specialized woodworking writing using the same "sawed"/"sawn" split as any other saw-related English text, regardless of the tool's cultural origin.
This British/American split mirrors a broader pattern seen in verbs like "shown/showed" and "proved/proven," where British English tends to preserve or favor an older irregular participle that American English has more thoroughly regularized. "Sawn" survives especially strongly in British compound nouns and adjectives like "sawn-off shotgun," a term almost never rendered as "sawed-off" in British writing, while American English uses "sawed-off" as its standard equivalent. Traditional hand-saw craftsmanship, particularly in Japanese woodworking, is sometimes described in English-language craft writing using both "sawn" and "sawed" depending on whether the writer is following British or American conventions, even within the same specialized niche.
The common confusion
The confusion is genuinely regional rather than a simple error: American writers should generally default to "sawed" for the participle ("the board had been sawed in half"), while British writers may reasonably use either "sawn" or "sawed," with "sawn" often preferred, especially in fixed compounds like "sawn-off."
How it's actually used
"Saw" (the cutting verb) appears constantly in construction, woodworking, and carpentry writing, and the choice between "sawn" and "sawed" is one of the more reliable markers distinguishing British from American technical prose in that specific domain. Forestry and lumber-industry reports use "sawn timber" as a standard technical category distinguishing processed lumber from raw, unprocessed logs. Specialty saw blades are marketed by the specific material they're rated to cut, with product copy distinguishing lumber that has been sawn cleanly from lumber left splintered by the wrong blade choice. A dull blade will leave wood sawn raggedly no matter how careful the carpenter is. A beginner given the wrong blade will find even soft pine surprisingly difficult to get sawn cleanly. A green, unseasoned log is notoriously harder to get sawn evenly than well-dried lumber. A crosscut blade sawed through the plank far faster than the old ripsaw ever could.
Across the tense system
The simple past is always "sawed" in both dialects — there is no irregular simple past "sew" or similar form; only the participle shows the British/American split, appearing as "sawn" or "sawed" depending on dialect. Woodworking instructional writing typically favors the imperative ("saw along the marked line") over any past-tense form, matching the step-by-step, present-focused style common to most craft tutorials.
Common real mistakes
The main error, if any, is an American writer using "sawn" where their house style expects "sawed," or vice versa for a British publication — this is a style-consistency issue rather than a strict grammatical mistake, since both forms are accepted somewhere in the English-speaking world. A further point: writers should never use "saw" (the cutting verb's past tense would be "sawed") when they actually mean the unrelated irregular past tense of "see," which is also spelled "saw" — context always distinguishes the two homographs.
Examples
- He sawed the fallen branch into smaller pieces for firewood.
- The lumber had been freshly sawn at the local mill.
- She sawed through the old lock with a hacksaw.
- Police recovered a sawn-off shotgun during the raid.
- The mill produces several grades of sawn timber for different construction uses.
- The carpenter sawed each board to the exact same length.
- The fine-toothed blade left the plywood sawn with almost no splintering.
Memory trick
Remember the split by dialect: Americans should reach for "sawed" by default for both past tense and participle; British writers may use "sawn" for the participle, especially in the fixed phrase "sawn-off."