Prepositions with nouns

Prepositions used with “motor”

Different prepositions with “motor” appear in technical, transport, and descriptive contexts. Some combinations are fixed expressions.

Quick answer

Which prepositions are natural with “motor”?

“By motor” appears in expressions about transport, especially “by motor car” in older or formal English. “Motor for” is common when describing purpose. “Motor in” and “motor with” often introduce location or features. “Of motor” is uncommon except inside larger noun phrases such as “failure of the motor.”

They travelled by motor car across the region.
We need a stronger motor for the pump.
The engineer replaced the fan motor in the dryer.

Choose the pattern by meaning

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

1
motor for + machine

Showing purpose or use

Use “motor for” when a motor is intended for a specific device.

They bought a new motor for the boat.
This is the correct motor for the conveyor.
2
by motor

Describing transport

Use “by motor” mainly in formal or older transport expressions.

The goods were transported by motor instead of rail.
They toured the coast by motor car.
3
motor in + place

Locating a motor

Use “motor in” when identifying where a motor is located.

The motor in the washing machine overheated.
They repaired the motor in the gate yesterday.
4
motor with + feature

Describing characteristics

Use “motor with” when adding details about a motor.

They designed a motor with low energy use.
We tested a motor with higher torque.

See the difference in context

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

Construction
Example
Meaning
for motor
a cover for the motor
Something intended for a motor.
with motor
a bicycle with a small motor
Having a motor as a feature.
in motor
damage in the motor housing
“In” usually refers to location, not a fixed phrase with motor.
by motor
They travelled by motor car.
Method of transport.
of motor
failure of the motor
Used after another noun in technical descriptions.

Common mistakes

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

Using “of motor” as a general modifier

English usually prefers noun compounds such as “motor failure” or a phrase with “for.”

✕ a part of motor ✓ a motor part

Using “by motor” for ordinary vehicles today

Modern English usually says “by car” or “by boat.”

✕ I go to work by motor. ✓ I go to work by car.

Quick practice

Choose the expression that matches the intended meaning.

1. We need a new motor ___ the pump.
2. The tourists travelled ___ motor car.
3. The motor ___ the refrigerator stopped working.

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Frequently asked questions

Is “by motor” common today?

It sounds formal or old-fashioned in many contexts. Modern English often uses “by car” or another specific vehicle.

Can I say “motor for the boat”?

Yes. This is a natural way to describe a motor intended for a boat.

Why is “of motor” uncommon?

English usually prefers noun compounds such as “motor failure” instead of “failure of motor.”

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