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Prepositions with nouns

Of field or in field?

In field alone is uncommon in standard English, but in the field is very common. Of field is usually incorrect except as part of longer phrases such as field of study.

Quick answer

Which phrase is correct?

Use in the field for work done outside an office or laboratory, or for activity within a professional area. Use field of for classification: a field of research. Of field by itself is not idiomatic.

The samples were collected in the field.
She works in the field of medicine.
Physics is a field of science.

Choose the pattern by meaning

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

1
in the field

Working outside or in practical conditions

Use in the field for real-world work away from an office, classroom, or laboratory.

Researchers spent months in the field.
The engineers tested the equipment in the field.
2
in the field of + subject

Talking about a professional area

Use in the field of to identify an area of work or study.

She has experience in the field of cybersecurity.
They are leaders in the field of genetics.
3
field of + area

Classifying a branch of study

Use field of before a discipline or topic.

Linguistics is a field of study.
Ecology is a field of science.

See the difference in context

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

Construction
Example
Meaning
in the field
Doctors worked in the field after the earthquake.
outside usual office or hospital conditions
in the field of
He lectures in the field of economics.
within a professional or academic area
field of
Astronomy is a field of research.
a category or branch
of field
The phrase of field is generally nonstandard.
not normally used as an independent construction

Common mistakes

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

Dropping the article in in the field

The article the is usually required.

✕ She works in field research. ✓ She works in the field of research.

Using of field as a standard phrase

English normally uses field of, not of field.

✕ a professor of field biology ✓ a professor of field biology courses

Confusing field with area

Field often needs additional structure such as field of.

✕ This field economics is growing. ✓ This field of economics is growing.

Quick practice

Choose the expression that matches the intended meaning.

1. The team gathered data ___ the field.
2. Chemistry is a field ___ science.
3. She works in the field ___ artificial intelligence.

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Frequently asked questions

Is in field ever correct?

It can appear in technical compounds such as in-field testing, but the normal phrase is in the field.

Why is of field uncommon?

English usually places field before of, as in field of study.

Can I say field research?

Yes. Field can directly modify another noun in compounds such as field research and field work.

of, about, against, to or for racism? of, about, for, in or on friendship? of, about, for, on or to thing? of, about, for, to or with sex? of, about, on, to or for moon? "of access" or "with access"? "of accommodation" or "for accommodation"? "of accuracy" or "for accuracy"? "of action" or "in action"? "of actor", "with actor" or "by actor"? "of address" or "to address"? "of administration" or "in administration"?

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