Past Tense of “throw”
The past tense of throw is threw; the past participle is thrown.
Why “throw” behaves this way
"Throw" comes from Old English "þrāwan," which originally meant "to twist" or "to turn" rather than "to hurl" — a sense still visible in the related word "throe" (a twisting pang of pain) and in the German cognate "drehen," meaning "to turn." The hurling sense developed later, but the verb kept its place among the class-7 strong verbs, the group that forms its past tense with a vowel shift toward "e" rather than a suffix.
"Throw" shares its exact pattern with "blow," "grow," and "know" (blew/blown, grew/grown, knew/known) — all four originally reduplicating verbs in prehistoric Germanic that later simplified to this ow/ew/own template. That family resemblance is why "threw" and "thrown" feel instantly familiar even to someone who has never studied the pattern explicitly: exposure to "blew" and "grew" primes the ear for "threw."
The common confusion
The overwhelming real-world confusion isn't between "threw" and "thrown" — it's between "threw" and its homophone "through," a pure spelling trap since the two words sound identical but share no history at all ("through" descends from a separate Old English preposition, "þurh"). Writers who type quickly will produce "he through the ball" far more often than any tense error with the verb itself. A separate figurative confusion involves the idiom 'throw a fight' or 'throw a game,' meaning to deliberately lose on purpose — an athletic slang sense unrelated to the literal act of hurling anything, and one that can confuse readers unfamiliar with sports jargon into picturing an object actually being thrown.
How it's actually used
"Throw" is transitive in its core physical sense (you throw something) but appears in a wide range of fixed idioms that stretch its meaning — "throw a party," "throw a fit," "throw shade," "throw in the towel" — none of which involve any actual hurling. These idiomatic uses inflect exactly like the literal verb (threw a fit, has thrown in the towel), so the irregular forms carry over without exception into figurative speech. In computing, 'throw' has picked up a precise technical sense — a program 'throws an exception' when it signals an error — and even in this jargon use, the verb keeps its ordinary irregular forms ('the function threw an error,' 'an exception has been thrown'), showing how thoroughly the irregular pattern is wired into the verb regardless of domain.
Across the tense system
The participle 'thrown' shows up constantly in the passive voice — 'the game was thrown,' 'caution was thrown to the wind,' 'the switch has been thrown' — contexts where the subject receives the action rather than performing it, a construction that leans on 'thrown' far more heavily than the active 'threw' ever needs to.
Common real mistakes
Confusing "threw" with "through" is the single most common error, since spellcheckers often miss it (both are valid words) and the mistake reads fine aloud. A secondary error is using "throwed" as a nonstandard past tense, a regularization pattern common in some dialects and in early child language before the irregular form is fully learned. Learners sometimes also default to "threw" after a helping verb ("I have threw it") instead of the correct participle "thrown."
Examples
- She threw the ball across the yard.
- He has thrown out most of his old notebooks.
- The company throws its annual gala in October.
- They were throwing snowballs at each other.
- Had he thrown the switch sooner, the machine would have stopped.
- The judge threw out the case for lack of evidence.
- Let's throw a party this weekend.
- The pitcher is throwing curveballs tonight.
- The function threw an unexpected error during testing.
Memory trick
Line "throw" up with "blow" and "grow": blew/blown, grew/grown, threw/thrown — same vowel, same ending, same family. If you can already say "the wind blew" and "the plant grew" without hesitating, "threw" should come just as automatically. For the spelling trap, remember that "through" always answers "where," describing a path or passage, while "threw" is only ever something a subject did with an object — if you can replace it with "tossed," it's "threw," never "through."