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Preposition before noun

Should you use “of source” or “to source”?

Neither “of source” nor “to source” is a common fixed expression with the noun “source.” The correct preposition depends on the sentence structure.

Quick answer

How “source” normally works

Use source of something to identify origin or provider. “To source” is usually a verb phrase meaning obtain something. “Of source” alone is not standard English.

source of information
The company plans to source materials locally
They confirmed the source of the leak

Choose the pattern by meaning

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

1
source of + thing

Identifying origin or provider

Use source of to show where something comes from.

source of energy
2
source for + activity

Showing intended use

Use source for when something serves as a supply or reference for a purpose.

This website is a useful source for researchers
3
from + source

Referring to origin

Use from with source when discussing where information or materials came from.

The data came from a reliable source

See the difference in context

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

Construction
Example
Meaning
of source
The phrase “of source” alone is not idiomatic.
English normally uses “source of something,” not “of source.”
to source
The company wants to source parts overseas.
Here source is a verb meaning obtain or supply.
source of
Water is a source of life.
Standard noun pattern showing origin or cause.
source for
It is a good source for statistics.
Shows usefulness for a purpose.

Common mistakes

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

Using “of source” as a standalone phrase

English places source before of.

✕ of source data ✓ source of data

Confusing noun and verb uses

To source uses source as a verb, not a noun.

✕ a to source of funding ✓ a source of funding

Missing the object after “source of”

The phrase usually needs a following noun.

✕ This is the source of. ✓ This is the source of the problem.

Quick practice

Choose the expression that matches the intended meaning.

1. Solar power is a source ___ clean energy.
2. The company hopes ___ materials locally.
3. We received the news from a reliable ___.

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Frequently asked questions

Is “of source” correct English?

Not as a normal standalone phrase. English usually uses “source of something.”

What does “to source” mean?

It means to obtain, supply, or find materials, products, or information.

Can “source” be both a noun and a verb?

Yes. “A source of income” uses the noun, while “to source ingredients” uses the verb.

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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