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Prepositions after verbs

Spearhead by or spearhead of?

Spearhead is usually used directly with an object: spearhead a campaign. Phrases with by or of are normally part of passive or noun structures.

Quick answer

How to use spearhead

Use spearhead as a transitive verb: spearhead a project, spearhead reform. In passive sentences, by introduces the person or group leading the action. Spearhead of is usually a noun phrase, not a verb pattern.

spearheaded the campaign last year.
The project was spearheaded by local engineers.
She helped spearhead a reform programme.

Choose the pattern by meaning

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

1
spearhead + project

Leading an activity or initiative

Spearhead normally takes a direct object without a preposition.

They spearheaded the expansion across Asia.
2
spearheaded by + person/group

Naming the leader in passive sentences

Use by after a passive form to identify who led the effort.

The campaign was spearheaded by the health ministry.
3
the spearhead of + movement

Using spearhead as a noun

As a noun, spearhead can mean the leading part of a movement or attack.

Youth activists became the spearhead of the protests.

See the difference in context

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

Construction
Example
Meaning
spearhead + object
She spearheaded the investigation.
Standard verb pattern meaning lead or direct.
spearheaded by + agent
The initiative was spearheaded by volunteers.
Passive structure naming the leader.
spearhead of + noun
The city became the spearhead of innovation.
Noun use meaning leading force.

Common mistakes

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

Adding of after the verb

Spearhead does not normally take of directly as a verb complement.

✕ They spearheaded of the campaign. ✓ They spearheaded the campaign.

Using by in an active clause

By usually appears in passive structures, not after an active verb.

✕ She spearheaded by the project team. ✓ She spearheaded the project with the team.

Quick practice

Choose the expression that matches the intended meaning.

1. The reform programme was ___ a coalition of teachers.
2. They plan to ___ a new marketing campaign.
3. The group became the ___ environmental activism.

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Frequently asked questions

Can spearhead be used without an object?

It is usually transitive, so an object is normally stated or understood.

Is spearhead by correct?

Yes, in passive structures such as was spearheaded by the committee.

Can spearhead of be a verb pattern?

No. Of is mainly used when spearhead is a noun, as in the spearhead of the movement.

sack, by, sack, for, sack, from "sacrifice for" or "sacrifice to"? sail from, in, for, to or through? "salvage from" or "salvage in"? sanction by, for, in, with or according? satisfy with, by, in, about or after? "saturate with" or "saturate in"? save by, for, from, on or in? "say in", "say about" or "say to"? "scan for", "scan in" or "scan through"? "scar by" or "scar on"? scatter in, across, around, throughout or on?

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