Prepositions after verbs

Espouse by or espouse in?

Espouse usually takes a direct object without a preposition. Espouse by and espouse in are generally not standard verb-preposition combinations.

Quick answer

How to use espouse correctly

Use espouse directly before an idea, belief, or cause, as in espouse democratic values. By and in are not normally used as fixed prepositions after espouse.

The party espouses free-market policies.
She espoused environmental reform throughout her career.
The organisation espouses equality in education.

Choose the pattern by meaning

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

1
espouse + belief/idea

Supporting an idea or cause

Espouse is usually followed directly by the belief, policy, or principle being supported.

The movement espouses nonviolent protest.
He espoused traditional values for many years.
2
espouse + policy/principle

Adopting official positions

Use espouse with political, social, or ethical positions.

The government espouses economic reform.
The charity espouses equal access to education.
3
be espoused by + group

Using passive voice

By can appear in passive constructions to name who supports an idea.

These views are espoused by many researchers.
The policy was espoused by senior leaders.

See the difference in context

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

Construction
Example
Meaning
espouse + idea
She espouses human rights.
support or adopt an idea
espouse by
The theory was espoused by several academics.
correct only in passive voice with by introducing the supporter
espouse in
They espouse equality in education.
in introduces a field or context, not a fixed complement after espouse

Common mistakes

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

Adding an unnecessary preposition

Espouse usually takes a direct object.

✕ They espouse in democracy. ✓ They espouse democracy.

Using by in active voice

By is generally used only in passive structures.

✕ She espoused by liberal thinkers the theory. ✓ The theory was espoused by liberal thinkers.

Confusing context with complement

In can describe a context but is not selected by espouse itself.

✕ The group espouses in equality. ✓ The group espouses equality.

Quick practice

Choose the expression that matches the intended meaning.

1. The organisation espouses ___ rights.
2. The idea was espoused ___ several politicians.
3. They espouse equality ___ the workplace.

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Frequently asked questions

Does espouse usually need a preposition?

No. Espouse normally takes a direct object, such as espouse reform or espouse equality.

Can espouse by ever be correct?

Yes, in passive structures like The theory was espoused by scholars.

Why does in sometimes appear after espouse?

In usually introduces a context or field, as in equality in education, rather than functioning as a fixed preposition after espouse.

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