Most plagiarism at university is not deliberate. It happens when a student sits with a source open beside them, rewrites a sentence word by word, adds a citation, and genuinely believes they have paraphrased. They have not, and the penalty is the same either way.
This guide explains how to paraphrase without plagiarising, and why the method matters more than the vocabulary.
What paraphrasing actually is
Paraphrasing means restating an idea in your own words and your own structure, with the source credited. Both halves are required.
Changing the words while keeping the sentence architecture is called patchwriting, and it is treated as plagiarism at almost every university, including when a citation is present. The citation covers the idea. It does not cover borrowed phrasing.
The mistake almost everyone makes
Here is a source sentence:
“Regular physical activity has been shown to significantly reduce symptoms of anxiety in young adults, particularly when undertaken outdoors.”
And here is what a student typically produces:
“Consistent bodily exercise has been demonstrated to considerably lessen indications of anxiety in youthful adults, especially when performed outside (Ahmed, 2021).”
Every word has been swapped. Nothing has been rewritten. The clause order is identical, the grammar is identical, and Turnitin will match it. It also reads badly, because thesaurus substitutions rarely carry the same register as the original.
Compare a real paraphrase:
“Ahmed (2021) found anxiety symptoms fell measurably among young adults who exercised regularly, with outdoor activity producing the strongest effect.”
The subject has moved, the structure is different, the emphasis has shifted onto the finding rather than the activity, and the sentence sounds like a person wrote it.
The method that works
The reason patchwriting happens is that the source is visible while you write. Remove it and the problem largely disappears.
- Read the passage twice, until you understand the point rather than the wording.
- Close the book or the tab. This single step prevents most accidental plagiarism.
- Write the idea from memory, as if explaining it to someone on your course.
- Reopen the source and check you have the meaning right, not the phrasing.
- Add the citation.
If you cannot restate the idea without looking, you do not understand it well enough to use it yet. That is useful information rather than an obstacle.
What you are allowed to keep
You do not have to find synonyms for everything, and trying to produces incomprehensible writing.
Technical terms stay as they are. If a paper discusses cognitive behavioural therapy, myocardial infarction or statutory interpretation, you use those terms, because there is no alternative and inventing one would be wrong. The same applies to named theories, instruments and standard measures.
What has to change is the sentence structure and the ordinary connecting language around those fixed terms.
When to quote instead
Paraphrase by default. Quote only when the exact wording carries the meaning:
- A definition whose precise phrasing is contested
- Wording you are going to analyse directly
- A statement so distinctively expressed that rewording would misrepresent it
- Primary material such as legislation, interview data or literary text
Outside those cases, quotation is usually a sign that the source has not been digested. A dissertation should rarely exceed about five per cent direct quotation, and heavy quoting is one of the main causes of an alarming Turnitin similarity score.
Citing correctly once you have paraphrased
A paraphrase still needs a citation. Students sometimes assume that rewording removes the obligation, which is exactly backwards: the idea is still someone else’s.
Place the citation so it is clear where the borrowed material starts and stops. If a whole paragraph draws on one source, signal it at the beginning rather than dropping a citation at the end and leaving the reader to guess the boundary. Naming the author in the sentence itself does this cleanly, and it also lets you show what you think of the source.
Page numbers are required for direct quotations in every major system, and recommended for paraphrases of a specific passage in APA and Chicago. Our comparison of Harvard and APA referencing covers the differences.
Summarising is not the same thing
A paraphrase restates one passage at roughly the same length. A summary compresses a longer piece into something much shorter.
Both need citations, and both need to be in your own structure. The difference matters when you are working through a body of literature, where summarising several studies into one comparative paragraph is what markers are actually looking for.
Common questions
How much do I need to change for it to count as my own words?
There is no percentage, and any rule of thumb you have been told is wrong. The test is structural: if someone could line your sentence up against the original clause by clause, it is not paraphrased, however many words differ.
Can I use a paraphrasing tool?
No. Spinners produce text that reads oddly, frequently changes the meaning, and is easy for markers to spot. At many universities, using one to disguise a source is treated as attempting to evade detection, which is a separate and more serious offence than the plagiarism itself.
Do I need to cite something that is common knowledge?
No, but the threshold is narrower than students assume. Common knowledge means facts an educated reader in your field would accept without a source. Anything contested, recent or specific to one study needs a citation.
What if two sources say the same thing?
Cite both in one bracket. It is a stronger claim than citing either alone and it demonstrates you have read across the field rather than relying on one paper.
If your draft is already too close to its sources
It is fixable, and it is better fixed before submission than explained afterwards. Work through the flagged passages, apply the close-the-source method to each one, and check that your citation boundaries are clear.
Our plagiarism and AI removal service rewrites over-matched passages properly, keeping the argument and the attribution intact rather than disguising the source. If you would rather have the whole piece checked before you submit, our proofreading and editing service covers referencing consistency as well as the writing.