Use promote to for a new rank or position. By usually introduces method or amount rather than a direct complement of promote.
Promote to is the standard pattern for moving someone to a higher position. Promote by is not normally used as a fixed verb pattern, although by can introduce method or degree.
These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.
Use to before the new role or level.
Promote can take a direct object without another preposition.
By often introduces the method used for promotion.
With numbers, by often shows the amount of increase rather than a complement after promote.
The same subject can take different constructions because each sentence answers a different question.
Some combinations appear in real text but do not mean what learners often assume.
Use to before a rank or position.
✕ She was promoted by supervisor. ✓ She was promoted to supervisor.A new position normally follows to.
✕ He was promoted manager. ✓ He was promoted to manager.Promote means advance or advertise, not simply raise a number.
✕ The company promoted prices by 5%. ✓ The company increased prices by 5%.By does not introduce the new rank.
✕ They promoted him by director. ✓ They promoted him to director.Choose the expression that matches the intended meaning.
Paste the complete sentence below. Linguix checks the preposition together with grammar, spelling, punctuation, and style.
Yes. Use promote someone to a position or be promoted to a position.
Only when by introduces the agent or method, such as promoted by advertising.
Yes. You can promote a product, idea, event, or policy directly.
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