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Prepositions after adjectives

Motionless in or motionless on?

Both motionless in and motionless on are correct. The choice depends on the place or surface being described.

Quick answer

Motionless in vs. motionless on

Use motionless in when someone or something is inside an area, space, or environment. Use motionless on when referring to a surface, object, or position on top of something.

She stood motionless in the doorway.
The cat lay motionless on the sofa.
They remained motionless in the dark room.
A leaf rested motionless on the water.

Choose the pattern by meaning

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

1
motionless in + place

Describing no movement inside an area or space

Use in for enclosed spaces, rooms, vehicles, crowds, or environments.

He sat motionless in the car.
The child remained motionless in the corner.
2
motionless on + surface

Describing no movement on a surface or object

Use on when the person or thing is resting on top of something.

The phone lay motionless on the table.
The bird stayed motionless on the branch.
3
remain motionless + adverbial phrase

Using motionless with different location expressions

Motionless can also be followed by other location phrases depending on the situation.

The audience remained motionless at the announcement.
She stood motionless beside the window.

See the difference in context

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

Construction
Example
Meaning
motionless in
He stood motionless in the hallway.
Inside a space or area without moving.
motionless on
The keys were motionless on the shelf.
Resting without movement on a surface.
motionless at
They stood motionless at the entrance.
At refers to a point or position rather than an enclosed place or surface.
motionless beside
The dog waited motionless beside the chair.
Beside shows position next to something.

Common mistakes

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

Using on for enclosed spaces

Use in, not on, when the person or thing is inside a room, vehicle, or area.

✕ She sat motionless on the car. ✓ She sat motionless in the car.

Using in for surfaces

Use on when something rests on a surface.

✕ The cup stayed motionless in the table. ✓ The cup stayed motionless on the table.

Assuming one preposition is always correct

Both in and on are natural, depending on the type of place being described.

✓ The child stood motionless in the doorway. The book lay motionless on the desk.

Quick practice

Choose the expression that matches the intended meaning.

1. The cat remained motionless ___ the bed.
2. He stood motionless ___ the elevator.
3. The guard stayed motionless ___ the gate.

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Frequently asked questions

Can motionless be used with both in and on?

Yes. Use in for enclosed spaces and on for surfaces.

Is motionless on the floor correct?

Yes. The floor is treated as a surface, so on is natural.

Do in and on change the meaning of motionless?

The adjective keeps the same meaning. The preposition only changes the type of location being described.

mad-at-about-with-for, in magical about, in, for, to or with? magic in, for, to, on or with? magnificent in, with, of, for or at? "mainstream in", "mainstream with" or "mainstream for"? major in, for, with, at or to? "manageable for", "manageable in" or "manageable by"? "mandatory for" or "mandatory in"? manifest in, to, by, from or on? "married to" or "married for"? "massive in" or "massive for"? "mature in" or "mature for"?

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