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Prepositions with nouns

Prepositions used with “witness”

The most common pattern is “witness to” for an event or change. Other prepositions depend on meaning and sentence structure.

Quick answer

Which prepositions are used with “witness”?

Use “witness to” for someone who saw or experienced something. “Witness for” and “witness for the defence” are common legal expressions. “Witness by” is not a normal noun pattern. “Witness with” usually introduces accompaniment rather than a fixed phrase.

She was a witness to the accident.
He testified as a witness for the defence.
The contract was signed with two witnesses present.

Choose the pattern by meaning

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

1
witness to + event

Person who saw or experienced something

Use “to” after “witness” for an event, change, or situation.

Residents became witnesses to the fire.
She was the only witness to the conversation.
2
witness for + side

Legal support or testimony

Use “for” in legal contexts to show which side a witness supports.

He appeared as a witness for the prosecution.
They called a witness for the company.
3
witness of + event

Formal or literary wording

“Witness of” exists in formal or older styles but is less common than “witness to”.

He was a witness of the destruction in the region.
The diary records a witness of history.

See the difference in context

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

Construction
Example
Meaning
witness to
She was a witness to the robbery.
someone who saw or experienced something
witness by
“Witness by” is not a normal fixed construction with the noun.
generally incorrect as a noun pattern
witness for
A witness for the defence spoke in court.
legal witness supporting a side
witness with
The form was signed with two witnesses.
“With” introduces accompanying people, not a fixed noun phrase
witness of
He was a witness of the conflict.
formal or literary alternative to “witness to”

Common mistakes

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

Using “witness by” as a noun phrase

English does not normally use “witness by” before a noun complement.

✕ a witness by the crime ✓ a witness to the crime

Using “witness for” outside legal meaning

For general events, use “witness to”.

✕ a witness for the accident ✓ a witness to the accident

Quick practice

Choose the expression that matches the intended meaning.

1. She was the only witness ___ the explosion.
2. The lawyer called a witness ___ the defence.
3. Which phrase is generally nonstandard as a fixed noun pattern?

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Frequently asked questions

Is “witness to” the standard form?

Yes. It is the most common pattern for someone who saw or experienced something.

Can “witness of” be used?

Yes, but it sounds more formal or literary than “witness to”.

What does “witness for” mean?

It usually refers to a legal witness speaking for one side in court.

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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