Remember that Meredith's Honor Code commits you to upholding standards of honesty and forthrightness. Representing someone else's work or words as your own is plagiarism. That includes copying sentences from sources without proper attribution, or even paraphrasing a source without changing the author's words sufficiently. This is a violation of the Honor Code and can lead to you being referred to the Honor Council for appropriate sanctions.
For guidance on what plagiarism is and how to avoid it, see the Plagiarism Tutorial that is loaded in your English class's Brightspace page.