Phrasal verbs combine a verb with a particle such as up, off, or in to create a new verbal unit. The particle may be an adverb or a preposition, and the whole expression can function as a single lexical verb. Some combinations are literal, while others are idiomatic and cannot be understood word by word.

Transitive phrasal verbs take an object, while intransitive phrasal verbs do not. Some transitive phrasal verbs are separable, so a pronoun usually comes between the verb and the particle. Other transitive phrasal verbs are inseparable, and three word phrasal verbs add a preposition after the particle. Meanings may also shift between literal and idiomatic uses, so context determines interpretation.

Idea	Example
A transitive separable phrasal verb can split around a noun object.	She turned down the music because the room was too loud.
A pronoun usually goes between the verb and the particle.	She turned it down because the room was too loud.
An inseparable phrasal verb keeps the object after the whole verb.	They looked after the children during the concert.
An intransitive phrasal verb does not take an object.	The car broke down on the highway.
A three word phrasal verb ends with a preposition.	I look forward to the holiday all year.
A phrasal verb can be literal in one context and idiomatic in another.	He took off his coat and then the plane took off.

Phrasal verbs conjugate like other verbs in English, and the particle stays attached to the verbal idea in every finite form. Regular phrasal verbs use the same spelling patterns for third person singular, past tense, and present participle. Irregular base verbs such as take, get, put, come, go, break, and run keep their irregular verb forms inside the phrasal construction.

Subject	Verb	Example
I or you	give up	I give up when the puzzle is impossible.
He or she	gives up	He gives up when the puzzle is impossible.
Past form	gave up	She gave up after the first round.
Present participle	giving up	They are giving up too early.
Irregular base verb	took off	The train took off on time.
Irregular base verb	ran into	We ran into trouble during the trip.

Infinitives, gerunds, and past participles keep the particle with the verb as a single lexical unit. These non finite forms appear after auxiliaries, prepositions, and many verbs that require another verb form. In passive constructions and perfect or continuous structures, the particle remains part of the phrasal verb.

Subject	Verb	Example
Infinitive form	to turn on	I need to turn on the lamp.
Gerund form	turning on	Turning on the heater helps in winter.
Past participle	turned on	The lamp has turned on automatically.
Perfect form	has given up	She has given up after many attempts.
Continuous form	is looking after	He is looking after the children today.
Passive form	were turned off	The lights were turned off at midnight.

Many phrasal verbs are informal, so careful writing often prefers a more neutral or formal alternative. Some phrasal verbs do not passivize naturally, and some change meaning when they appear in a passive structure. Regional choices also vary, and one variety may prefer a different particle or expression from another.

Region	Word or Phrase	Regional Definition	Example
UK	queue up	This phrase is common in British English for waiting in line.	We queued up outside the theatre.
US	line up	This phrase is common in American English for waiting in a row.	We lined up for lunch.
General	turn down	This phrase is often informal and may sound less formal in writing.	Please turn down the volume.
General	put up with	This phrase is a fixed three word phrasal verb with a preposition.	She puts up with noisy neighbors.

High frequency phrasal verbs appear early in reading and conversation, especially when they express movement, change, routine actions, or reactions. The most useful early set includes verbs built from take, get, put, come, go, break, and run because they recur in many everyday expressions. These forms are especially important because their meanings often extend beyond the literal meaning of the base verb.

Subject	Verb	Example
Take	take off	The plane takes off after sunset.
Get	get up	He gets up before dawn.
Put	put on	She puts on a warm coat.
Come	come back	They come back every summer.
Go	go out	We go out on Fridays.
Break	break down	The machine breaks down in winter.
Run	run into	I ran into an old friend downtown.

Phrasal verbs are verb phrases built from a base verb and a particle, and their grammar depends on whether they are transitive, intransitive, separable, inseparable, or three word forms. Their conjugation follows English verb rules, including irregular spelling and non finite forms, while auxiliaries carry tense, aspect, and voice around the phrasal core. Meanings range from literal to idiomatic, so the same form may describe physical movement, completion, or sudden change in different contexts.