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Prepositions after verbs

How to use “execute” with by and in

Execute is usually used without a fixed preposition. By and in may appear after execute, but they normally introduce method, agent, time, or context rather than forming set verb-preposition combinations.

Quick answer

Execute does not normally take a fixed preposition

Use execute directly with an object: execute a plan, execute a command, execute a prisoner. Phrases with by or in are usually separate parts of the sentence, such as passive voice with by or context with in.

The team executed the plan successfully.
The order was executed by a local contractor.
The operation was executed in secret.

Choose the pattern by meaning

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

1
execute + object

Carrying out an action or plan

Execute is commonly used directly with an object and no preposition.

They executed the strategy perfectly.
The software executes commands automatically.
2
executed by + agent

Naming who performed the action

In passive sentences, by introduces the person or thing that carried out the action.

The search warrant was executed by federal agents.
The design was executed by a skilled craftsperson.
3
executed in + manner/context

Showing manner, style, or context

In can describe the way, language, style, or conditions in which something is carried out.

The agreement was executed in duplicate.
The mission was executed in complete silence.

See the difference in context

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

Construction
Example
Meaning
execute by
The task was executed by an external team.
By usually introduces the agent in a passive sentence, not a fixed pattern after execute.
execute in
The document was executed in ink.
In can describe manner, material, language, or context.
execute + object
The company executed the merger quickly.
Most common structure with execute: direct object and no preposition.
execute on
The program executes on multiple platforms.
On may appear with software systems to show the platform where something runs.

Common mistakes

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

Adding an unnecessary preposition

Execute often takes a direct object without a preposition.

✕ They executed on the plan quickly. ✓ They executed the plan quickly.

Treating by as a fixed complement

By usually introduces the agent in passive voice.

✕ The manager executed by the project. ✓ The project was executed by the manager.

Using in instead of a direct object

In usually gives context or manner, not the main object.

✕ They executed in the strategy. ✓ They executed the strategy.

Confusing execute with perform

Execute is often more formal and frequently used for plans, orders, documents, or legal actions.

✕ She executed a song on stage. ✓ She performed a song on stage.

Quick practice

Choose the expression that matches the intended meaning.

1. The company executed ___ agreement yesterday.
2. The warrant was executed ___ local police.
3. The document was executed ___ duplicate.

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Frequently asked questions

Can I say execute by someone?

Yes, in passive sentences such as The order was executed by the committee. Here, by introduces the agent.

What does execute in mean?

It usually describes context, form, or manner, as in executed in secret or executed in writing.

Does execute always mean kill?

No. It can also mean carry out a plan, perform a command, or complete a legal document.

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