As a noun:
* The book's excerpt gave me a glimpse into the main character's childhood.
* The magazine published an excerpt from the author's new novel.
* I read an excerpt from the play online and was immediately hooked.
As a verb:
* The editor excerpted the most interesting parts of the interview.
* She excerpted the relevant information from the long report.
* The website excerpts articles from various newspapers.
In a sentence:
* The movie's trailer was just an excerpt from the film, so I was eager to see the full version.
* You can excerpt the most important information from the document for easy reference.
* The professor asked us to excerpt a paragraph from the text and analyze it.