What is the past participle of buy?

The past participle of the verb buy is bought. It is the same as the simple past tense form of the verb.

Bought and brought (the past tense of “bring”) are often confused. But they cannot be used interchangeably.

Buy is an irregular verb, so it doesn’t add “-ed” to form the past tenses. The past participle is used to form the perfect tenses (e.g., “Have you bought any new shoes lately?”) and the passive voice (e.g., “There were no ice creams left—they had all been bought by the previous customer”).

You can ensure you’re using the past participle of “buy” correctly with the QuillBot Grammar Checker.