Prepositions after verbs

Grasp at or grasp by?

Use grasp at for trying eagerly or desperately to get something. Grasp by is not a standard fixed pattern, but by can introduce the body part or feature used to hold something.

Quick answer

Which preposition is correct with grasp?

Grasp at means to try to seize or obtain something quickly or desperately, often figuratively. Grasp by is not a usual verb pattern, although by can describe how something is physically held.

Investors were grasping at any sign of recovery.
She grasped at the rope as she slipped.
He lifted the suitcase by the handle.
The child grasped the toy by its edge.

Choose the pattern by meaning

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

1
grasp at + object

Trying desperately to get or use something

Use grasp at for urgent or eager attempts, often figurative.

The team was grasping at new opportunities.
He grasped at a final excuse during the interview.
2
grasp + object

Holding something firmly

Grasp commonly takes a direct object without a preposition.

She grasped the rail tightly.
The baby grasped my finger.
3
grasp + object by + part

Describing the way something is held

By introduces the part used to hold or move something.

He grasped the bag by the strap.
The officer grasped him by the arm.
4
grasp at + idea

Trying to understand or accept an idea

Grasp at can also describe attempts to understand something difficult.

Students were grasping at the main concept.
I was still grasping at the implications of the decision.

See the difference in context

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

Construction
Example
Meaning
grasp at
She grasped at the chance to speak.
Correct for eager or desperate attempts to seize an opportunity or object.
grasp by
He grasped the child by the hand.
By introduces the body part or feature used for holding, not a fixed pattern after grasp.
grasp something
They quickly grasped the problem.
Common direct-object pattern meaning understand or hold firmly.
grasp for
He grasped for the keys in the dark.
Another idiomatic pattern meaning reach out in search of something.

Common mistakes

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

Using by without an object

By usually follows the object being held.

✕ She grasped by the wrist. ✓ She grasped him by the wrist.

Using at for simple physical holding

Use a direct object for firm physical holding.

✕ He grasped at the steering wheel. ✓ He grasped the steering wheel.

Confusing grasp at with understand

Grasp at suggests trying, not fully understanding.

✕ I grasped at the instructions immediately. ✓ I grasped the instructions immediately.

Using by as the main complement

Grasp does not normally take by directly after the verb.

✕ They grasped by new solutions. ✓ They grasped at new solutions.

Quick practice

Choose the expression that matches the intended meaning.

1. She was grasping ___ any opportunity to improve sales.
2. The child grasped the adult ___ the hand.
3. He quickly grasped ___ main idea.

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Frequently asked questions

Is grasp at always negative?

No. It often suggests urgency or eagerness, but the context may be neutral or positive.

Can grasp mean understand?

Yes. You can grasp an idea, concept, or situation without a preposition.

Is grasp by correct English?

It can appear in phrases like grasp someone by the arm, where by describes the point of contact rather than a fixed verb pattern.

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