You may look up the word or look the word up, but you must look after the child, not look the child after. Both expressions contain a verb followed by a short word, yet their grammar is different.
In look up, the word up is a particle. In look after, the word after is a preposition that introduces its object.
This distinction affects:
- Where nouns and pronouns belong
- Whether the expression may be separated
- How the structure is shown in a dictionary
- Whether the following word belongs to the verb or introduces a separate phrase
Grammar references do not always classify multi-word verbs in exactly the same way. Some use phrasal verb only for verb-particle combinations, while many dictionaries use the term more broadly. The most reliable approach is to learn the complete pattern for each expression.
Phrasal, Prepositional, and Phrasal-Prepositional Verbs at a Glance
| Type | Structure | Example pattern | Example sentence |
|---|---|---|---|
| Phrasal verb | verb + particle | look something up | Emma looked the address up. |
| Prepositional verb | verb + preposition | look after somebody | Emma looked after her nephew. |
| Phrasal-prepositional verb | verb + particle + preposition | put up with something | Emma put up with the delay. |
| Ordinary verb + prepositional phrase | verb + optional prepositional phrase | walk through the park | Emma walked through the park. |
The main practical differences involve the object.
A separable phrasal verb may allow a noun between the verb and particle:
Look the address up.
A prepositional verb keeps the preposition before its object:
Look after the child.
A standard phrasal-prepositional verb normally keeps all three words together:
Put up with the noise.
An ordinary prepositional phrase adds information such as place, direction, time, or manner without necessarily forming a fixed multi-word verb.
What Are Phrasal and Prepositional Verbs?
Phrasal Verbs
A phrasal verb is formed from a main verb and a particle. The particle works with the verb to create a complete verbal meaning.
Examples include:
- bring up
- call off
- hand in
- look up
- take apart
- turn down
Some phrasal verbs take an object:
Sophie turned the radio down.
Others are intransitive and do not take a direct object:
The engine broke down.
The guests showed up early.
A transitive phrasal verb may be separable or inseparable, depending on its established pattern and meaning.
Prepositional Verbs
A prepositional verb consists of a verb followed by a particular preposition that introduces the verb’s complement.
Examples include:
- believe in something
- depend on somebody
- listen to something
- look after somebody
- rely on something
- wait for somebody
The object follows the preposition:
Daniel listened to the recording.
Daniel listened to it.
The object cannot normally move between the verb and preposition:
Incorrect: Daniel listened the recording to.
The preposition forms a unit with the following noun, pronoun, or -ing form.
Why Grammar Sources Classify Them Differently
The term phrasal verb has a narrow meaning in some grammar references and a broader meaning in many learner dictionaries.
Under a strict structural distinction:
- look up is a phrasal verb.
- look after is a prepositional verb.
- look forward to is a phrasal-prepositional verb.
However, a learner dictionary may label all three as phrasal verbs because they are multi-word expressions that need to be learned as complete vocabulary items.
Neither approach necessarily contains an error. The sources are using the term for different purposes.
A grammar reference may focus on structure:
- particle
- preposition
- object position
- transitivity
A learner dictionary may focus on practical vocabulary learning:
- meaning
- usage
- examples
- common patterns
The structural distinction still matters because it determines how nouns and pronouns fit into a sentence.
For example:
look something up
look after somebody
These dictionary-style patterns immediately show that the expressions do not use objects in the same way.
How Object Placement Reveals the Difference
Object placement provides one of the clearest practical differences between phrasal and prepositional verbs.
Noun Objects With Separable Phrasal Verbs
A noun object may often appear before or after the particle.
Olivia turned off the lamp.
Olivia turned the lamp off.
Both sentences are grammatical.
More examples:
James handed in the report.
James handed the report in.
Lucy picked up the parcel.
Lucy picked the parcel up.
This movement is possible because off, in, and up function as particles in these meanings.
Pronouns With Separable Phrasal Verbs
An object pronoun must appear between the verb and particle.
Olivia turned it off.
Incorrect: Olivia turned off it.
James handed it in.
Incorrect: James handed in it.
Lucy picked it up.
Incorrect: Lucy picked up it.
This rule applies to separable phrasal verbs. It does not apply to every multi-word verb.
Objects With Prepositional Verbs
A prepositional verb keeps its preposition before the object.
Olivia listened to the speaker.
Olivia listened to him.
Incorrect: Olivia listened the speaker to.
James depended on his assistant.
James depended on her.
Incorrect: James depended her on.
Lucy looked after the dog.
Lucy looked after it.
Incorrect: Lucy looked it after.
The pronoun follows the preposition because it is the object of that preposition.
Objects With Phrasal-Prepositional Verbs
A standard phrasal-prepositional verb contains a verb, particle, and preposition.
Examples include:
- come up with something
- get away with something
- look forward to something
- put up with something
- run out of something
The object normally follows the complete expression:
Sophie came up with a solution.
Sophie came up with it.
Incorrect: Sophie came it up with.
Daniel put up with the interruption.
Daniel put up with it.
Incorrect: Daniel put it up with.
The final preposition introduces the object.
Limits of the Object-Movement Test
Moving the object is a strong test only in the right situation.
It works best when:
- The expression is transitive.
- It has a noun object.
- The phrasal verb is separable in the intended meaning.
It cannot classify an intransitive phrasal verb because there is no object to move:
The guests showed up.
It also cannot prove that every phrasal verb is separable. Some verb-particle combinations do not allow ordinary object movement in a particular meaning.
The same words may also follow different patterns when their meaning changes.
Compare:
Emma turned the lamp on.
Here, turn something on means activate and is separable.
The dog suddenly turned on its owner.
Here, turn on somebody means attack or become hostile toward that person. The object follows on.
The meaning must be identified before the pattern is tested.
How to Identify the Correct Pattern
No single shortcut classifies every multi-word verb. Use a short sequence of checks instead.
1. Identify the Intended Meaning
The same combination may have several meanings and structures.
Compare:
look up a word
look up the staircase
In the first sentence, look up means search for information.
In the second, up the staircase describes the direction of the person’s gaze.
The visible words are similar, but the structures are different.
2. Check Whether the Expression Takes an Object
Ask what or whom receives the action.
Hannah called off the meeting.
The meeting is the object.
The meeting broke up at noon.
There is no direct object.
Object movement cannot be tested when the expression is intransitive.
3. Test a Noun Object When Appropriate
For a transitive expression, see whether the noun may appear between the verb and following word.
look up the number
look the number up
The movement supports an analysis of up as a particle.
Compare:
rely on the evidence
Incorrect: rely the evidence on
The object cannot divide the verb and preposition.
4. Check Pronoun Placement
Replace the noun object with a pronoun.
look it up
rely on it
put up with it
The pronoun position reveals the established pattern more clearly than a definition alone.
5. Check What the Short Word Belongs With
A particle combines closely with the verb:
turn off | the device
A preposition introduces the following complement:
depend | on the device
A phrasal-prepositional verb contains both:
put up | with the delay
This grouping helps explain why the object appears in a particular position.
6. Verify the Complete Pattern
A reliable dictionary may display patterns such as:
- turn something off
- look after somebody
- depend on something
- put up with somebody or something
These patterns show:
- Whether an object is required
- Whether a person or thing may follow
- Where the object belongs
- Whether the expression contains an internal object position
Record the complete pattern rather than only a short meaning.
Instead of:
turn off = deactivate
record:
turn something off
Pronoun pattern: turn it off
Instead of:
look after = care for
record:
look after somebody or something
Pronoun pattern: look after them
Clues That Are Useful but Not Conclusive
Several features may support an analysis, but they should not be used as universal tests.
Idiomatic Meaning
Phrasal verbs are often described as expressions whose meanings cannot be predicted from the individual words. This is sometimes true:
give up = stop trying
However, some phrasal verbs have fairly transparent meanings:
- sit down
- come back
- go out
- take something away
Prepositional verbs may also have meanings that are not fully predictable:
- look after somebody
- take after somebody
- come across something
- get over something
Meaning may provide a clue, but it does not determine the grammatical category.
Single-Word Alternatives
A multi-word verb may have a one-word alternative:
- put off → postpone
- look after → supervise or care for
- put up with → tolerate
The existence of a synonym does not identify whether the expression is phrasal, prepositional, or phrasal-prepositional.
Stress
Particles often receive stronger stress than prepositions in speech.
However, stress may change because of:
- Sentence focus
- Contrast
- Dialect
- Speaking rhythm
- The information being emphasised
Stress can support an analysis, but it is not a dependable test by itself.
Intuition
A familiar expression may “sound right,” but intuition is less reliable when the expression is new or has several meanings.
The safer method is to verify the complete object pattern.
Not Every Verb Followed by a Preposition Is a Prepositional Verb
A sentence may contain a verb followed by a prepositional phrase without forming a fixed prepositional verb.
Compare:
Emma walked across the field.
The phrase across the field describes the route.
The verb may be followed by many other phrases:
- walked through the gate
- walked along the river
- walked toward the station
- walked around the building
The choice of preposition depends on the route being described.
Now compare:
Emma looked after the children.
Here, look after is an established expression meaning care for. Replacing after with another preposition changes or destroys that meaning.
An ordinary prepositional phrase commonly adds information about:
- Place
- Time
- Direction
- Manner
- Position
A prepositional verb selects a particular preposition as part of its conventional pattern.
Compare:
Daniel sat beside the window.
The phrase describes position.
Daniel relied on his assistant.
The expression rely on conventionally requires on before its complement.
The boundary is not always obvious from appearance alone. The complete pattern and intended meaning provide better evidence.
What Are Phrasal-Prepositional Verbs?
A phrasal-prepositional verb contains:
verb + particle + preposition
Examples include:
- come up with
- get away with
- look forward to
- put up with
- run out of
These expressions are also commonly called three-word phrasal verbs.
The object normally follows the final preposition:
Emily came up with a better proposal.
Emily came up with it.
Thomas ran out of printer ink.
Thomas ran out of it.
The three main words remain together in these standard patterns.
Some longer expressions have a fixed internal object position:
take something out on somebody
talk somebody out of doing something
For example:
James took his frustration out on his brother.
Lucy talked her friend out of quitting the course.
These patterns should be learned as complete structures rather than treated as freely separable expressions.
Five Sentence Breakdowns
The following examples show how the main categories work in complete sentences.
1. “Please Look the Address Up”
Expression: look up
Category: Phrasal verb
Pattern: look something up
The noun phrase the address appears between the verb and particle.
The alternative order is also possible:
Please look up the address.
With a pronoun:
Please look it up.
2. “Please Look After the Children”
Expression: look after
Category: Prepositional verb under the strict distinction
Pattern: look after somebody
The preposition after introduces its complement, the children.
The object cannot move:
Incorrect: Please look the children after.
With a pronoun:
Please look after them.
3. “The Guests Showed Up Early”
Expression: show up
Category: Intransitive phrasal verb
There is no direct object.
The word early describes when the guests arrived. It is not the object of the phrasal verb.
Because no object exists, separability cannot be tested in this sentence.
4. “We Put Up With the Delay”
Expression: put up with
Category: Phrasal-prepositional verb
Pattern: put up with something
The noun phrase the delay follows the preposition with.
With a pronoun:
We put up with it.
Incorrect: We put it up with.
5. “They Walked Along the Beach”
Main verb: walked
Following phrase: along the beach
Category: Ordinary verb + prepositional phrase
The phrase describes the route.
The preposition may change according to the intended direction:
- walked across the beach
- walked toward the beach
- walked away from the beach
The words walked along do not form one fixed multi-word verb in this sentence.
Common Phrasal and Prepositional Verb Patterns
Phrasal Verbs
The following are phrasal verbs in the stricter verb-particle sense.
| Expression | Meaning | Pattern |
|---|---|---|
| bring up | mention | bring something up |
| call off | cancel | call something off |
| fill out | complete a form | fill something out |
| hand in | submit | hand something in |
| leave out | omit | leave something out |
| look up | search for information | look something up |
| pick up | lift or collect | pick somebody or something up |
| put away | return to storage | put something away |
| take apart | separate into pieces | take something apart |
| turn down | refuse or reduce | turn something down |
With pronouns:
- bring it up
- call it off
- fill it out
- hand it in
- pick them up
- turn it down
Prepositional Verbs
The following verbs conventionally select a particular preposition before their complement.
| Expression | Meaning | Pattern |
|---|---|---|
| believe in | accept as true or support | believe in something |
| cope with | manage a difficulty | cope with something |
| deal with | handle | deal with something |
| depend on | rely on | depend on somebody or something |
| listen to | pay attention to sound | listen to somebody or something |
| look after | care for | look after somebody or something |
| look at | direct your eyes toward | look at something |
| look for | try to find | look for somebody or something |
| rely on | depend on | rely on somebody or something |
| wait for | remain until something arrives | wait for somebody or something |
With pronouns:
- believe in it
- cope with it
- depend on them
- listen to her
- look after him
- wait for it
The pronoun remains after the preposition.
Final Point
The most useful difference between phrasal and prepositional verbs appears in their object patterns.
Compare:
- look something up
- look it up
- look after somebody
- look after them
- put up with something
- put up with it
Do not rely only on whether an expression is idiomatic or whether it has a one-word synonym. Identify the intended meaning, check where the object belongs, and record the complete pattern. That method remains useful even when dictionaries apply different category labels.
FAQs About Phrasal and Prepositional Verbs
What is the difference between a phrasal verb and a prepositional verb?
A phrasal verb contains a verb and particle, while a prepositional verb contains a verb followed by a preposition that introduces its complement. A separable phrasal verb may allow an object between its parts, as in look it up. A prepositional verb keeps the object after the preposition, as in look after it.
How do you identify a prepositional verb?
Check whether the verb conventionally requires a particular preposition before its complement. In depend on something, the object must follow on. It cannot move between the verb and preposition. Verifying the full dictionary pattern is more reliable than judging the meaning alone.
Are prepositional verbs separable?
No. The preposition stays before its complement. Say listen to the recording and listen to it, not listen the recording to or listen it to.
Are all phrasal verbs separable?
No. Some phrasal verbs are intransitive and have no object, as in the car broke down. Others may have patterns that do not allow ordinary object movement in a particular meaning. Separability must be checked for the intended expression and meaning.
Is “look after” a phrasal verb or a prepositional verb?
Under a strict grammatical distinction, look after is a prepositional verb because after introduces its object: look after the child. Many learner dictionaries use phrasal verb as a broader label and may classify it that way for vocabulary teaching.
Is “depend on” a phrasal verb?
Under the strict distinction, depend on is a prepositional verb. The preposition on introduces the complement, as in depend on somebody or depend on it. Some broad teaching materials may group it with multi-word or phrasal verbs.
Can a prepositional verb take a pronoun?
Yes. The pronoun follows the preposition: listen to it, depend on her, and look after them. It does not move between the verb and preposition.
What is a phrasal-prepositional verb?
A phrasal-prepositional verb contains a verb, particle, and preposition. Examples include put up with, come up with, look forward to, and run out of. The object normally follows the complete expression.
Why do dictionaries classify multi-word verbs differently?
Grammar references often classify expressions according to their structure, while learner dictionaries may use phrasal verb as a broad label for several kinds of multi-word verbs. The labels may differ even when the meaning and usage pattern are the same.
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