Threw vs. Through: What's the Difference?
Distinguish threw, the past tense of throw, from through, which expresses movement, duration, or completion, with examples, a quiz, and FAQs.
Threw is the simple past tense of throw: she threw the ball. Through is usually a preposition or adverb meaning from one side to another, during a period, by means of, or finished. They sound alike but have different spellings and grammatical jobs.
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A status update says the team “worked threw the weekend.” No object was tossed; the sentence describes duration, so the correct phrase is worked through the weekend.
Threw vs. Through at a glance
| Word | Typical role | Meaning | Example |
|---|---|---|---|
| threw | Past-tense verb | tossed, propelled, caused to fall, or put suddenly into a state | The pitcher threw the ball toward first base. |
| through | Preposition, adverb, or adjective | from side to side; during; by means of; completed | We reviewed the proposal through the secure portal. |
How to use threw
Threw is only the simple past of throw. Beyond physical tossing, English uses it in phrases such as threw a party, threw a switch, threw support behind a plan, and threw the schedule into confusion.
The pitcher threw the ball toward first base.
How to use through
Through expresses passage in space, time, stages, or a process. It can also describe completion: when a person is through with a task, the task is finished. It is not a past-tense form of throw.
We reviewed the proposal through the secure portal.
Rules that make the choice easier
Use threw for a past action
If throw or toss works in the present tense, threw is likely correct in the past: throws today, threw yesterday.
Use through for passage or duration
Movement through a tunnel, work through the night, and service through an app all use through.
Use the substitution test
Replace the word with tossed. If the sentence still makes sense, choose threw; if across, during, or finished fits, choose through.
Common mistakes to avoid
- Incorrect: We drove threw the storm. Correct: We drove through the storm.
- Incorrect: She through the keys on the table. Correct: She threw the keys.
- Do not confuse through with the informal spelling thru in formal prose.
Quick practice
1. He ___ the receipt away by mistake.
Answer: threw
2. The train passed ___ three tunnels.
Answer: through
3. We worked ___ the remaining questions.
Answer: through
Frequently asked questions
What is the difference between threw and through?
Threw is the past tense of throw; through expresses passage, duration, means, or completion.
Is it threw me off or through me off?
Use threw me off because the phrase is the past tense of throw off.
Is it all the way through or threw?
Use through for movement or progress from beginning to end.
Do threw and through sound the same?
In standard pronunciation they are homophones, so context and grammar determine the spelling.