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Prepositions after verbs

trespass on vs trespass in

Trespass on is the standard verb pattern for violating rights or entering property improperly. Trespass in can appear when in introduces a place, not as a fixed combination.

Quick answer

Which form is standard?

Use trespass on for rights, property, or territory. Trespass in is possible only when in introduces a location phrase, such as trespass in the park.

They were warned not to trespass on private land.
Several people were caught trespassing in the restricted area.

Choose the pattern by meaning

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

1
trespass on + property/rights

Entering or violating improperly

Use trespass on for physical property or figurative rights.

The company must not trespass on local communities' rights.
2
trespass in + location

Using in as a place adjunct

In can introduce the place where trespassing happens, but it is not the core verb pattern.

They were trespassing in a military zone.
3
trespass against + person/principle

Formal or legal language

Against appears in formal expressions about wrongdoing or offence.

He felt they had trespassed against tradition.

See the difference in context

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

Construction
Example
Meaning
trespass on
No one may trespass on this land.
Standard pattern for unlawful entry or violation.
trespass in
They were trespassing in the forest reserve.
In introduces the location where the trespassing occurs.
trespass against
The act trespassed against accepted rules.
Formal expression about violating principles or standards.

Common mistakes

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

Treating trespass in as the main pattern

Trespass on is the standard fixed combination for property or rights.

✕ They trespassed in my property. ✓ They trespassed on my property.

Using on with broad location adjuncts

When naming the place generally, in may be more natural.

✕ They were trespassing on the shopping centre at night. ✓ They were trespassing in the shopping centre at night.

Quick practice

Choose the expression that matches the intended meaning.

1. The sign warned visitors not to ___ private land.
2. Several teenagers were caught ___ the abandoned building.
3. The article argued that the law could ___ civil liberties.

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Frequently asked questions

Can trespass on be figurative?

Yes. It can refer to violating rights, privacy, or boundaries.

Is trespass in wrong?

No. It is possible when in simply introduces a place.

Is trespass a legal term?

Yes. It is common in legal and property contexts.

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