Prepositions after adjectives

Curious about vs. curious as

Curious about is the normal pattern for interest or wanting information. Curious as is not a standard adjective pattern, though as may appear in other sentence structures.

Quick answer

Which preposition goes with curious?

Use curious about when talking about interest or wanting to know something. Curious as is generally not idiomatic as a direct pattern after curious.

I'm curious about the new policy
She became curious about his background
The children were curious about space travel

Choose the pattern by meaning

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

1
curious about + topic

Showing interest in something

Curious about is the standard pattern for wanting information or feeling interest.

They are curious about the results
He was curious about local traditions
2
curious to + verb

Wanting to know or experience something

Curious is often followed by an infinitive.

I'm curious to see what happens
She was curious to learn more
3
curious whether/why/how

Introducing an indirect question

Curious can introduce clauses about uncertainty or interest.

We were curious why the meeting ended early
He is curious whether they will agree

See the difference in context

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

Construction
Example
Meaning
curious about
She is curious about the process.
Standard pattern for interest or inquiry.
curious as
As curious as it sounds, the story is true.
As here belongs to the comparison pattern as curious as, not to curious itself.
curious of
They were curious about the machine.
Curious of is rare and old-fashioned in modern English.
curious regarding
Customers are curious regarding the update.
Formal alternative meaning interested in or asking about.

Common mistakes

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

Using curious as as a direct pattern

English normally uses about after curious.

✕ I'm curious as the plan ✓ I'm curious about the plan

Forgetting the preposition

Curious usually needs about before a noun topic.

✕ She is curious the changes ✓ She is curious about the changes

Using curious of in everyday English

Curious of sounds old-fashioned or literary.

✕ He was curious of the outcome ✓ He was curious about the outcome

Confusing curious with strange

Curious can also mean unusual in some contexts.

✕ a curious about smell ✓ a curious smell

Quick practice

Choose the expression that matches the intended meaning.

1. They are ___ the company's decision.
2. I'm curious ___ see the final design.
3. Which sentence is idiomatic?

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Frequently asked questions

Is curious as ever correct?

It can appear in comparison structures such as as curious as, but not usually as a direct preposition after curious.

Can curious be followed by a clause?

Yes. You can say curious why, curious whether, or curious how.

What does curious mean?

It usually means interested and wanting to know more, though it can also mean unusual.

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