Conjugation of "Buy" — All Forms, Examples, and Usage
To obtain something by paying money in exchange for it; to make a purchase
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All 12 Tenses of "Buy"
Quick reference table — every tense form of "buy" with the first-person example and a link to the grammar guide for that tense.
| Tense | Example (I) | Quick rule |
|---|---|---|
| Simple Present | I buy |
Used for habits, facts, routines, and permanent situations. Full rule → |
| Simple Past | I buyed |
Used for completed actions at a specific time in the past. Full rule → |
| Simple Future | I will buy |
Used for predictions, decisions made at the moment, and promises. Full rule → |
| Present Continuous | I am buying |
Used for actions happening right now or temporary situations. Full rule → |
| Past Continuous | I was buying |
Used for actions in progress at a specific moment in the past. Full rule → |
| Future Continuous | I will be buying |
Used for actions that will be in progress at a specific future time. Full rule → |
| Present Perfect | I have buyed |
Used for past actions with present relevance, life experiences, or unfinished situations. Full rule → |
| Past Perfect | I had buyed |
Used for an action that was completed before another past action. Full rule → |
| Future Perfect | I will have buyed |
Used for an action that will be completed before a specific future time. Full rule → |
| Present Perfect Continuous | I have been buying |
Used for actions that started in the past and continue now, with focus on duration. Full rule → |
| Past Perfect Continuous | I had been buying |
Used for ongoing actions in the past that continued up to another past moment. Full rule → |
| Future Perfect Continuous | I will have been buying |
Used for actions that will have been ongoing up until a specific future time. Full rule → |
Past Tense of "Buy" — Bought
The past simple of "buy" is "bought". Use it for completed actions at a specific past time. Because "buy" is irregular, "bought" is not formed by adding -ed — you have to memorize this form. See our simple past tense guide for a deeper explanation of the simple past.
Past Participle of "Buy" — Bought
The past participle of "buy" is "bought". Use it after "have/has/had" for the perfect tenses ("I have bought"), and after "be" for passive constructions ("It was bought"). Because "buy" is irregular, "bought" is not the same as the past simple — students often confuse the two forms.
Is "Buy" Regular or Irregular?
"Buy" is an irregular English verb. Its principal parts are: base form "buy", past simple "bought", and past participle "bought". The 3rd-person singular present is "buys" and the present participle/gerund is "buying". Conjugation pattern: Strong verb: buy-bought-bought (vowel change i to o).
Conjugation pattern: Strong verb: buy-bought-bought (vowel change i to o)
How to Pronounce "Buy" and Its Forms
Buy: /baɪ/ — Stress pattern: O
The 'ai' in buy sounds like the 'i' in 'kite'; rhymes with 'try', 'fly', 'sky' — it's a long i sound /aɪ/.
Common mispronunciation of "buy"
Sometimes pronounced as /bɪ/ or /bɛ/ instead of /baɪ/; keep the long i sound.
How to Use "Buy" — Common Grammar Patterns
Use buy as a transitive verb (needs an object): buy something. Cannot say 'I buy' without saying what you're buying in most contexts.
S + V + object (direct object required)S + V + object + prep phrase (buy X for Y)
Example Sentences with "Buy" in Different Tenses
- Simple Present: I buy groceries every Saturday morning. A1
Common Collocations with "Buy"
- buy something for someone — I bought a book for my brother.
- buy someone something — She bought him a watch.
- buy groceries — I buy groceries at the supermarket.
- buy a gift — We bought a gift for their anniversary.
- buy online — Many people buy clothes online now.
When to Use "Buy" vs Similar Verbs
"buy" vs "by"
By is a preposition (by car); buy is a verb (buy food)
"buy" vs "bye"
Bye is goodbye; buy is to purchase
Smart synonyms — when to use each one
- purchase — More formal than buy; preferred in business contexts
- acquire — When buying valuable or difficult-to-obtain items formally
- grab — Casual verb for quickly buying small everyday items
Antonyms: sell
Common Mistakes with "Buy"
-
Wrong: I buyed a car.
Correct: I bought a car.
"Bought" is the past tense of "buy", not "buyed". -
Wrong: She buy a dress yesterday.
Correct: She bought a dress yesterday.
Use past tense "bought" for past actions. -
Wrong: He bought a gift to his sister.
Correct: He bought his sister a gift. / He bought a gift for his sister.
Use "for" or indirect object structure; "to" is incorrect here.
Origin and Etymology of "Buy"
From Old English bycgan; related to Germanic root meaning to dwell or settle (trading concept)
Buying culture varies globally; bargaining is expected in many markets; fixed-price retail is typical in Western stores; e-commerce has transformed buying behavior
Conjugation Tables for "Buy"
Negative Forms
- Simple present: I do not buy · He does not buy
- Simple past: I did not buy · She did not buy
- Present perfect: I have not bought · He has not bought
Question Forms
- Simple present: Do you buy? · Does he buy?
- Simple past: Did you buy?
- Present perfect: Have you bought?
Passive Voice (where applicable)
- Simple present passive: It is bought
- Simple past passive: It was bought
- Present perfect passive: It has been bought
Frequently Asked Questions About "Buy"
- Is "buy" regular or irregular?
- "buy" is an irregular verb. Its past simple is "buyed" and past participle is "buyed". You must memorize these forms.
- What is the past tense of "buy"?
- The simple past of "buy" is "buyed".
- Are the past simple and past participle the same for "buy"?
- Yes, for this irregular verb, both the past simple and past participle are "buyed".
- What's a common mistake with "buy"?
- "Bought" is the past tense of "buy", not "buyed". Wrong: "I buyed a car." Correct: "I bought a car."