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Prepositions after verbs

trail by vs. trail in

Trail by is standard for being behind in a score or ranking. Trail in appears mainly before categories such as polls or sales.

Quick answer

Which form is correct?

Use trail by to state the amount of difference: trail by five points. Use trail in before an area or category: trail in customer satisfaction.

The team trailed by two goals
The company trails in online sales
She was trailing by several seconds
The region trails in productivity

Choose the pattern by meaning

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

1
trail by + amount

Showing how far behind someone is

By introduces the difference in points, votes, time, or position.

They were trailing by ten votes
2
trail in + area

Showing weakness in a category

In introduces the field or category where someone performs worse.

The school trails in science scores

See the difference in context

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

Construction
Example
Meaning
trail by
Our team trailed by three points.
Standard pattern showing the amount of difference.
trail in
The brand trails in customer loyalty.
Used before an area, field, or category.

Common mistakes

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

Using by before a category

By should introduce an amount, not a field.

✕ The company trails by innovation. ✓ The company trails in innovation.

Using in before a number difference

In is not used for numerical gaps.

✕ The candidate trails in five votes. ✓ The candidate trails by five votes.

Quick practice

Choose the expression that matches the intended meaning.

1. The runner was trailing ___ four seconds.
2. The country trails ___ digital infrastructure.
3. We are trailing ___ two goals at halftime.

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Frequently asked questions

Can trail in describe sports scores?

Not usually. Sports scores normally use trail by.

Is trail by only for sports?

No. It can also describe polls, rankings, and time differences.

Can I omit the preposition?

Sometimes. For example, The company trails competitors is possible, but the meaning changes slightly.

tackle by, in, for, with or on? tack-on-onto-to-across, as "tag with" or "tag in"? tailor to, for, from, toward or towards? "taint by" or "taint with"? "take into", "take in" or "take to"? "talk about" or "talk to"? tally with, in, for, up or at? "tap into" or "tap on"? target at, by, for, to or in? tarnish by, in, with, after or as? "taste like", "taste of" or "taste in"?

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