“Theory” in a Sentence (with Audio)

Examples of how to use the word “theory” in a sentence. How to connect “theory” with other words to make correct English sentences.

theory (n): a formal statement of the rules on which a subject of study is based or of ideas that are suggested to explain a fact or event or, more generally, an opinion or explanation

Use “theory” in a sentence

There are a number of different theories about the cause of the disease.
There is no evidence to support such a theory.
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You need to apply theory into practice.

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