Prepositions with extent

In extent or to extent?

In extent and to extent are generally nonstandard in modern English. English normally uses to some extent, to a great extent, or in extent only after a measurement adjective.

Quick answer

What should you say instead?

Use phrases such as to some extent or to a large extent. In extent is rare and mainly appears after adjectives like equal in extent. To extent without a determiner is incorrect.

I agree to some extent.
The damage was great in extent.
The two regions are equal in extent.

Choose the pattern by meaning

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

1
to some extent

Showing partial agreement or degree

Use to some extent to mean partly or moderately.

The plan succeeded to some extent.
She understood the risks to some extent.
2
to a great extent

Showing a large degree

Use this phrase for strong influence or effect.

Weather determines the harvest to a great extent.
The result depended to a large extent on timing.
3
adjective + in extent

Describing size or scope

In extent can follow certain adjectives in formal descriptions.

The lakes are similar in extent.
The territories were vast in extent.

See the difference in context

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

Construction
Example
Meaning
in extent
The two forests are similar in extent.
formal description of size or scope after an adjective
to extent
Nonstandard in modern English.
normally replaced by to some extent or to a certain extent
to some extent
I agree to some extent.
partly
to a great extent
The outcome depended on luck to a great extent.
largely or mostly

Common mistakes

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

Using to extent without a determiner

Extent usually needs some, a certain, a great, or another modifier.

✕ I agree to extent. ✓ I agree to some extent.

Using in extent as a general adverb

In extent usually follows an adjective.

✕ The project failed in extent. ✓ The project failed to a great extent.

Confusing extent with extend

Extent is a noun, while extend is a verb.

✕ We extent the deadline. ✓ We extend the deadline.

Quick practice

Choose the expression that matches the intended meaning.

1. I understand your concern ___
2. The deserts are similar ___
3. The economy depends on exports ___

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Frequently asked questions

Is to extent correct English?

No. Standard English uses to some extent, to a certain extent, or similar phrases.

Can in extent be correct?

Yes, but mainly in formal descriptions after adjectives such as similar, equal, or vast.

What is the most common phrase with extent?

To some extent is one of the most widely used expressions with extent.

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