Simple uses:
* "The students made a pledge to donate their allowance to charity."
* "The politician made a pledge to improve public education."
* "The couple exchanged pledges of love and commitment during their wedding ceremony."
More specific uses:
* Pledge of allegiance: A formal statement of loyalty or commitment, often to a country or its flag.
* Pledge drive: A campaign to collect money or support for a cause.
* Pledge to a cause: A promise to support a specific social or political cause.
* Pledge of support: A statement of willingness to help someone or something.
* Pledge of protection: A promise to keep someone or something safe.
Figurative use:
* "The artist's paintings were a pledge to the power of beauty." (Here, the pledge represents the artist's dedication to their art.)
Note: You can also use "pledge" as a verb, meaning to promise or commit to something.