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Prepositions after adjectives

How to use suitable with prepositions

Suitable is most commonly followed by for. Suitable to is less common and more formal. As and in usually belong to different sentence patterns rather than directly following suitable.

Quick answer

Suitable for vs. suitable to

Use suitable for to show purpose, person, or situation: suitable for children. Suitable to is formal and usually refers to matching a purpose or occasion. As and in are normally part of another structure, not fixed combinations with suitable.

This software is suitable for beginners.
The tone was suitable to the occasion.
She is suitable as a team leader.
The dress is suitable in warm weather.

Choose the pattern by meaning

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

1
suitable for + purpose/person

Showing who or what something matches

Use suitable for to describe the right use, audience, or condition.

These boots are suitable for hiking.
The film is not suitable for young children.
2
suitable to + situation

Formal use for matching a situation

Suitable to is more formal and less common than suitable for.

His remarks were suitable to the occasion.
The design is suitable to modern offices.
3
suitable as + role

Describing a role or function

As introduces a role or identity, not a fixed adjective-preposition pair.

She would be suitable as a spokesperson.
4
suitable in + context

Adding a context or condition

In usually introduces a separate context such as time, place, or conditions.

These clothes are suitable in cold weather.

See the difference in context

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

Construction
Example
Meaning
suitable for
This course is suitable for beginners.
standard way to show intended use or audience
suitable to
The language was suitable to the ceremony.
formal way to show appropriateness to a situation
suitable as
He is suitable as a mediator.
as introduces a role or function
suitable in
Light fabrics are suitable in hot climates.
in introduces the context, not a fixed pairing

Common mistakes

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

Using suitable to in everyday contexts

Suitable for is usually more natural in modern English.

✕ This app is suitable to children. ✓ This app is suitable for children.

Confusing as with for

Use for for purpose or audience, and as for a role.

✕ She is suitable for a manager. ✓ She is suitable as a manager.

Treating in as the main preposition

In usually adds context rather than completing the adjective.

✕ The toy is suitable in toddlers. ✓ The toy is suitable for toddlers.

Quick practice

Choose the expression that matches the intended meaning.

1. This book is suitable ___ intermediate learners.
2. His behaviour was suitable ___ the formal event.
3. She would be suitable ___ the position of director.

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Frequently asked questions

Is suitable for more common than suitable to?

Yes. Suitable for is the standard choice in most everyday contexts.

Can I say suitable as?

Yes, when you mean suitable in the role of something, such as suitable as a teacher.

Is suitable in correct?

It can be correct when in introduces a context, such as weather or location.

sacred-to-in-by-of, for "sad for" or "sad about"? "safe for", "safe from" or "safe in"? sanguine about, in, of, on or for? "satisfactory to" or "satisfactory for"? satisfied with, of, by, in or on? "satisfying for" or "satisfying to"? scarce in, for, at, on or of? scared of, to, about, for or by? "scary for" or "scary to"? "scathing about", "scathing in" or "scathing of"? "sceptical about" or "sceptical of"?

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