Prepositions after verbs

Spot in or spot by?

Spot usually takes a direct object without a preposition. In and by are generally used to add location information, not as fixed verb patterns.

Quick answer

Do we say spot in or spot by?

Usually, neither. The verb spot normally takes a direct object, as in spot a mistake or spot a friend. In and by can describe where someone or something is seen.

I spotted a deer near the road.
She spotted him in the crowd.
We spotted a café by the river.

Choose the pattern by meaning

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

1
spot + object

Notice or see something

Spot is commonly followed directly by the person or thing seen.

Can you spot the difference between these pictures?
I spotted my teacher at the station.
2
spot + object + in + place

Show where something was seen

In introduces the surrounding place or area.

They spotted a shark in the water.
She spotted her friend in the audience.
3
spot + object + by + place

Show position near something

By means near or beside a place.

We spotted a cabin by the lake.
He spotted his keys by the door.

See the difference in context

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

Construction
Example
Meaning
spot in
She spotted him in the crowd.
In introduces the place where the person was seen.
spot by
We spotted a restaurant by the beach.
By introduces a nearby location.
spot + object
I spotted an error in the report.
The normal verb pattern uses a direct object without a preposition.

Common mistakes

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

Adding an unnecessary preposition

Spot usually takes a direct object.

✕ I spotted at the bird. ✓ I spotted the bird.

Treating in as the main verb pattern

In introduces location, not the object of the verb.

✕ She spotted in the man. ✓ She spotted the man.

Using by without a clear location

By should introduce a nearby place or object.

✕ He spotted by the wallet. ✓ He spotted the wallet by the chair.

Quick practice

Choose the expression that matches the intended meaning.

1. I spotted my cousin ___ the crowd.
2. We spotted a small house ___ the river.
3. Can you spot ___ mistake in this sentence?

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Frequently asked questions

Is spot in a fixed expression?

No. In usually introduces location after the object.

Can I say spot by?

Only when by introduces a nearby place, such as by the river or by the door.

What is the most common structure with spot?

The standard structure is spot plus a direct object.

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