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Prepositions after develop

Develop in vs. develop by

Develop in usually refers to place, field, or area. Develop by often refers to method, creator, or deadline depending on context.

Quick answer

Choosing between develop in and develop by

Use develop in for areas, places, or fields where growth happens. Use develop by for means, creator, or time limits. The meaning changes with the preposition.

Children develop in different ways.
The software was developed by a small startup.
Skills develop in challenging environments.

Choose the pattern by meaning

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

1
develop in + area/place

Showing where growth or change happens

In introduces a field, environment, or location where development occurs.

Tourism continues to develop in rural regions.
Confidence can develop in supportive classrooms.
2
develop by + person/company

Naming the creator or developer

By introduces the person or organisation responsible for creating something.

The app was developed by university researchers.
The vaccine was developed by an international team.
3
develop by + deadline

Setting a completion time

By can also mean before a specific time.

They hope to develop by next summer a workable prototype.
The product should be developed by 2027.
4
develop in + skill/field

Growing within a subject or ability

In can introduce a subject area or professional field.

She wants to develop in digital marketing.
Students often develop in confidence over time.

See the difference in context

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

Construction
Example
Meaning
develop in
New industries are developing in the region.
shows place, field, or environment
develop by
The platform was developed by engineers in Seoul.
shows the creator or agent
develop by
The team aims to develop the system by June.
shows a deadline
develop with
Children develop with practice and support.
with introduces accompanying factors and is also common

Common mistakes

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

Confusing place with creator

Use in for location or field and by for the creator.

✕ The software developed in a local company. ✓ The software was developed by a local company.

Using by instead of in for environments

In is more natural for settings where development happens.

✕ Children develop by healthy homes. ✓ Children develop in healthy homes.

Forgetting the passive form

When naming the creator, use be developed by.

✕ The app developed by students last year. ✓ The app was developed by students last year.

Quick practice

Choose the expression that matches the intended meaning.

1. The technology was developed ___ a research team.
2. Many skills develop ___ demanding workplaces.
3. The company plans to develop the tool ___ next year.

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Frequently asked questions

Is develop in correct?

Yes. It is common for places, environments, and subject areas.

What does developed by mean?

It identifies the person, company, or group that created something.

Can by mean a deadline with develop?

Yes. By can mean before a certain time, as in developed by next year.

dabble, in, dabble, with "damage to" or "damage by"? dance to, with, on, in or for? "dangle from" or "dangle in"? dare to, for, on, as or at? dash to, into, out, from or on? daydream about, for, in, of or on? "debate in", "debate on" or "debate with"? deceive by, in, into, on or about? "decide on", "decide to" or "decide by"? declare in, by, on, to or as? decline in, by, from, to or for?

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