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Prepositions after verbs

correct by, for, in, on or to?

Correct can combine with several prepositions depending on meaning. Some combinations are fixed, while others are separate time or method phrases.

Quick answer

Which prepositions go with correct?

Use correct in for errors in a subject or detail, correct on for being accurate about a topic, and correct to when changing something to a new form or amount. By often introduces method or deadline, not a fixed complement. Correct for is common in technical contexts.

You were correct in your analysis.
She was correct on every detail.
The figures were corrected to two decimal places.

Choose the pattern by meaning

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

1
correct in + area/detail

Being accurate in something

Use in to refer to a field, statement, or detail where someone is accurate.

The scientist was correct in her prediction.
You are correct in saying the deadline changed.
2
correct on + topic

Being right about a subject

Use on to refer to a topic, issue, or point under discussion.

He was correct on the legal question.
The article is correct on the historical facts.
3
correct to + amount/form

Changing something to the right value or form

Use to after corrected when something is changed into a correct state.

The total was corrected to 450 dollars.
The text was corrected to standard spelling.
4
correct for + factor

Adjusting for conditions or variables

In technical and scientific English, correct for means adjust to account for something.

Researchers corrected for age differences.
The software corrects for lighting changes.

See the difference in context

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

Construction
Example
Meaning
correct in
She was correct in her assumption.
Used for accuracy in a statement or judgement.
correct on
They were correct on the main issue.
Used for being right about a topic.
correct to
The amount was corrected to €90.
Shows the new correct form or value.
correct for
The data was corrected for inflation.
Means adjust to account for a factor.
correct by
Please correct the report by Friday.
By usually introduces a deadline or method, not a fixed complement after correct.

Common mistakes

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

Using by as a fixed complement

By usually adds time or method information, not the main verb pattern.

✕ The teacher corrected by grammar mistakes. ✓ The teacher corrected grammar mistakes.

Confusing in and on

Use in for accuracy within a statement or judgement, and on for a topic or issue.

✕ She was correct on saying the figures were wrong. ✓ She was correct in saying the figures were wrong.

Using to without a new value or form

Correct to normally introduces the corrected result.

✕ The editor corrected to the report. ✓ The editor corrected the report.

Quick practice

Choose the expression that matches the intended meaning.

1. The accountant corrected the total ___ $1,200.
2. You were correct ___ saying the train was delayed.
3. The study corrected ___ regional differences.

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Frequently asked questions

Is correct by a standard combination?

Not usually. By commonly introduces time or method information, such as by Friday or by hand.

What is the difference between correct in and correct on?

Correct in refers to accuracy within a statement or judgement. Correct on refers to being right about a topic.

When do we use correct for?

Use correct for when adjusting data or results to account for a condition or variable.

calculate, by, calculate, in, calculate, from "call for" or "call on"? "campaign for" or "campaign against"? cancel by, due, at, in or for? capitulate to, in, like, by or after? captivate by, for, with, from or in? "capture by" or "capture in"? "care about" or "care for"? carry with, by, in, to or into? carve into, out, in, on or with? cast in, into, for, by or on? "catch in", "catch by" or "catch on"?

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