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Preposition before noun

Using prepositions with “border”

The noun “border” commonly appears with expressions such as “across the border,” “on the border,” and “border between.” “Of border” is limited to larger noun phrases.

Quick answer

Which form is correct?

“Across the border” is a common and natural expression for movement from one country or area to another. “Of border” usually appears only after another noun, such as “security of border regions.”

They travelled across the border at night.
The town lies on the border between the two countries.
Officials discussed the security of border areas.

Choose the pattern by meaning

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

1
across the border

Showing movement from one side to another

Use “across the border” for travel or movement between regions or countries.

Goods moved across the border every day.
Families fled across the border during the conflict.
2
on the border

Showing location near a boundary

Use “on the border” for places located at a boundary.

The village is on the border of the province.
They live on the border between the two states.
3
border between + places

Naming two areas separated by a border

Use “between” when identifying the two sides.

The river forms the border between the countries.
This wall marks the border between public and private land.
4
of border + noun

Using “of border” inside a larger phrase

“Of border” is uncommon alone but possible in phrases where “border” modifies another noun.

The history of border communities is complex.
Officials reviewed the development of border infrastructure.

See the difference in context

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

Construction
Example
Meaning
across border
People crossed across the border safely.
Natural English normally includes “the”: “across the border.”
of border
The culture of border towns is diverse.
Possible only in larger noun phrases.
across the border
Trade increased across the border.
Standard expression for crossing from one side to another.
on the border
The city sits on the border.
Shows location at a boundary.

Common mistakes

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

Omitting the article

English usually requires “the” in this expression.

✕ They travelled across border. ✓ They travelled across the border.

Using “of border” alone

This combination normally needs another noun.

✕ We discussed of border. ✓ We discussed border security.

Confusing movement and location

Use “across” for movement and “on” for location.

✕ The town is across the border between the states. ✓ The town is on the border between the states.

Using “between” with only one place

“Between” requires two sides or areas.

✕ the border between Canada ✓ the border between Canada and the US

Quick practice

Choose the expression that matches the intended meaning.

1. They escaped ___ during the night.
2. The town is located ___ of the country.
3. The river forms the border ___ the two nations.

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Frequently asked questions

Is “across border” correct?

Standard English usually says “across the border.”

Can I use “of border”?

Only in larger phrases such as “history of border regions.”

What is the difference between “across the border” and “on the border”?

“Across the border” shows movement. “On the border” shows location.

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