Preposition after verb

denounce as or denounce by?

Denounce is commonly followed by as when you describe the role, identity, or nature of someone or something. By is usually not a complement after denounce, though by can appear separately in a sentence.

Quick answer

Which preposition is correct after denounce?

Use denounce as to describe what someone or something is condemned or labelled as. Denounce by is not a standard verb-preposition pattern. However, by may appear separately to introduce the person performing the action in passive sentences or a method.

The group was denounced as a security threat.
She denounced the policy as unfair.
The report was denounced by several experts.

Choose the pattern by meaning

These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.

1
denounce as + role/quality

Describing what someone or something is condemned as

Use as after denounce to state the label, identity, or quality assigned to the target.

The minister was denounced as corrupt.
Critics denounced the film as offensive.
2
denounce + noun

Condemning something directly

Denounce can take a direct object without a following preposition.

They denounced the attack.
The newspaper denounced government censorship.
3
denounced by + person/group

Naming who made the criticism

By is used separately in passive constructions to identify the critic, not as a complement selected by denounce.

The proposal was denounced by local residents.
He was denounced by former allies.

See the difference in context

The same subject can take different constructions because each sentence answers a different question.

Construction
Example
Meaning
denounce as
The practice was denounced as dangerous.
Standard pattern for labelling or characterising something negatively.
denounce by
The senator was denounced by journalists.
By introduces the agent in a passive sentence, not a fixed combination with denounce.
denounce for
She denounced the company for misleading customers.
Used to state the reason for criticism.

Common mistakes

Some combinations appear in real text but do not mean what learners often assume.

Using by as the main complement after denounce

Denounce does not normally take by to express the accusation or label.

✕ They denounced him by a criminal. ✓ They denounced him as a criminal.

Adding an unnecessary preposition

Denounce can take a direct object without a preposition.

✕ She denounced against the decision. ✓ She denounced the decision.

Confusing passive by with a verb pattern

In passive sentences, by introduces the person making the criticism.

✕ The law was denounced as activists. ✓ The law was denounced by activists.

Quick practice

Choose the expression that matches the intended meaning.

1. The organisation was denounced ___ dishonest.
2. The policy was denounced ___ several economists.
3. They denounced the company ___ misleading consumers.

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Frequently asked questions

Can I say denounce by someone?

Yes, in passive sentences such as was denounced by critics. Here by introduces the agent, not a fixed verb-preposition pattern.

Is denounce as common?

Yes. It is standard when you describe someone or something with a negative label, such as denounced as dangerous.

Can denounce be used without a preposition?

Yes. You can directly denounce an action, policy, or person.

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