Through vs. Threw
“Through” is chiefly a preposition/adverb about movement, position, time, or completion; “threw” is the simple past of “throw.” They can sound alike in many accents but have different grammatical jobs and meanings.
“Through” is chiefly a preposition/adverb about movement, position, time, or completion; “threw” is the simple past of “throw.”
Key details
Choose the right form
| Meaning/job | Use | Decision |
|---|---|---|
| past action of throw | threw | Use the simple-past verb. |
| movement or passage from one side/part to another | through | Use the preposition/adverb. |
| duration, completion, or related non-throw meaning | through | Use “through” when its documented non-verb senses fit. |
Quick tests
Throw-action test
Does the word mean the past action of throwing something?
If yes: Use “threw.”
If no: Test whether “through” expresses passage, position, duration, or completion.
Caveat: The two forms may be homophones in many accents, so pronunciation is not a reliable spelling rule.
Examples
She threw the paper into the recycling bin.
“Threw” is the past tense of “throw.”
We walked through the tunnel.
“Through” expresses passage from one side to another.
He worked through the afternoon.
“Through” expresses duration over the period.
Further guidance
Core difference
“Through” is chiefly a preposition/adverb about movement, position, time, or completion; “threw” is the simple past of “throw.”
Fast Test
If you mean the past action of throwing, use “threw”; otherwise test whether “through” expresses passage, position, duration, or completion.
Usage Boundary
They can sound alike in many accents but have different grammatical jobs and meanings.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- Through — English meaning (opens in a new tab)Cambridge University Press · Dictionary meaning of through as by or using a person, process, or means
- throw — Cambridge Dictionary (opens in a new tab)Cambridge Dictionary · Cambridge lists threw as the past tense and thrown as the past participle of throw.