Past Tense of “knit”
The past tense of knit is knit; the past participle is knit.
Why “knit” behaves this way
"Knit" comes from Old English "cnyttan," originally meaning to tie or fasten with a knot — the craft sense of interlocking yarn into fabric developed later as a specialized extension of the general "to join or fasten" meaning. Like "hit" and "put," "knit" belongs to the small class of English verbs with a short vowel before a single final consonant that historically resisted the regular -ed ending.
Modern usage has genuinely split the verb by meaning: the literal craft sense of knitting with needles and yarn has become largely regularized to "knitted" ("she knitted a sweater"), while the more figurative, non-craft senses — "knit brows," "a tight-knit community," "a well-knit plot" — have kept the older unchanged form "knit," preserving the original "joined together" meaning in fixed expressions even as the everyday hobby sense moved toward regular conjugation.
The common confusion
The confusion is genuinely meaning-dependent rather than arbitrary: "she has knitted three sweaters this winter" (craft sense, regularized) sits comfortably alongside "his brow knit in confusion" (figurative sense, unchanged) in the very same piece of writing, without either being wrong, because the two senses have drifted onto separate grammatical tracks. Non-native speakers learning English from a single dictionary entry sometimes miss this split entirely, since many dictionaries list both forms together without clearly flagging which sense each one belongs to. A good rule of thumb: if yarn or needles are involved, reach for "knitted"; if not, the older unchanged "knit" is almost always safer.
How it's actually used
"Knit" survives in a cluster of figurative expressions about close connection or careful joining — "tightly knit," "knit together," "knit one's brow" (frown, from the image of eyebrows drawing together like fabric being fastened) — that have outlasted the everyday craft usage as a distinct, semi-idiomatic vocabulary set. Medical writing also uses "knit" for bones healing and rejoining after a fracture ("the bone knit cleanly"), a further figurative extension of the original "fasten together" sense that has nothing to do with either yarn or communities.
Across the tense system
In the figurative sense, "knit" is unchanged across simple past and past participle exactly like "hit" or "put"; in the literal craft sense, most contemporary usage instead follows the fully regular "knitted/has knitted" pattern, so a single verb genuinely straddles two different conjugation patterns depending on which meaning is in play. Few other English verbs show this kind of clean meaning-based split between an irregular and a regular past form, which makes "knit" a genuinely useful teaching example for how usage can fork along semantic rather than purely grammatical lines.
Common real mistakes
The main real mistake is using "knit" (unchanged) for the literal hobby sense where most contemporary style guides now expect "knitted" ("she knit a scarf" reads as slightly old-fashioned compared to "she knitted a scarf"), or conversely using "knitted" in the fixed figurative phrases, which almost always keep the older unchanged form ("the community grew tightly knitted" sounds off compared to the standard "tightly knit"). Medical usage almost always keeps the unchanged "knit" as well ("the fracture has knit well"), rarely regularizing the way the craft sense has, which can surprise writers expecting a single consistent rule across all of the verb's senses.
Examples
- She knitted a scarf for her nephew over the holidays.
- His brow knit in concentration as he read the contract.
- The neighborhood is a tightly knit community.
- Grandma has knitted mittens for every grandchild this year.
- The plot knits together several storylines by the final chapter.
- They knit their fingers together and waited nervously.
- The two families have grown closely knit over the years.
Memory trick
Split "knit" in two: for actual yarn-and-needles knitting, reach for the regular "knitted," but for anything figuratively joined together — brows, communities, plots — keep the old unchanged "knit," as in "tightly knit," which never becomes "tightly knitted." A healing bone follows the figurative rule too, since it's really about pieces rejoining rather than yarn looping, so "the fracture knit well" stays unchanged just like a knit brow.