English is full of short, everyday verbs that team up with a small word like up, off, on, or out to make a new verb with its own meaning: wake up, turn off, look after. These are phrasal verbs, and native speakers use them constantly in conversation — often instead of a single "fancier" verb you might already know (give up instead of quit, find out instead of discover). The grammar isn't hard once you see the pattern; the tricky part is knowing where the pronoun goes.

Quick shortcut. A phrasal verb = verb + particle (turn + off), and together they often mean something you can't guess from the two words alone. Some can be split by an object (turn off the light / turn the light off), and with a pronoun the split is required: ✅ turn it off, never ❌ turn off it.

What is a phrasal verb?

A phrasal verb is a verb combined with a particle — a small word that looks like a preposition (up, down, on, off, in, out, away, back...) and can add direction, complete the meaning, or create a whole new idiomatic meaning. In this article, "phrasal verb" is used in the broad, everyday sense that includes both true particle verbs like turn off and inseparable combinations like look after — in stricter grammar these are sometimes called prepositional verbs, but for a learner the two behave similarly enough to introduce together:

  • wake + up → wake up (stop sleeping)
  • give + up → give up (stop trying)
  • look + after → look after (take care of)

The meaning is often idiomatic — it can't be worked out just by knowing give and up separately. Give up smoking has nothing to do with physically handing something upward. Some phrasal verbs do keep a more literal meaning too (sit down, come in), so it's worth learning each one as a small chunk of vocabulary, not building it up word by word.

Three patterns

Phrasal verbs behave differently depending on whether they take an object, and if so, whether that object can go in the middle.

1. No object (intransitive)

Some phrasal verbs are used with no object at all, in this particular meaning:

  • What time did you wake up?
  • Please sit down.
  • The plane took off on time.

Be careful: the same verb can sometimes take an object with a related but different meaning — wake someone up, take your shoes off.

2. Separable (object can go in the middle or after)

Many phrasal verbs take an object, and with a noun, you can usually put it either after the whole phrasal verb or in the middle, between the verb and the particle:

  • Can you turn off the light? / Can you turn the light off?
  • She picked up the keys. / She picked the keys up.

But with a personal object pronoun (it, them, him, her, us, me...), the object must go in the middle — this is the single most important rule in this whole topic:

  • ✅ Can you turn it off? — never ❌ Can you turn off it?
  • ✅ She picked it up. — never ❌ She picked up it.

3. Inseparable (object always comes after)

Some phrasal verbs can never be split — the object always comes straight after the particle, whether it's a noun or a pronoun:

  • ✅ She looks after the kids. / ✅ She looks after them. — never ❌ She looks the kids after.
  • ✅ I ran into an old friend. / ✅ I ran into her.
Type Pattern Example
No object verb + particle wake up, sit down
Separable verb + noun + particle or verb + particle + noun; pronoun must split turn the light off / turn it off
Inseparable verb + particle + object (never splits) look after them

Some phrasal verbs even have two small words, like look forward to or put up with — those follow their own pattern and are worth learning separately once these three feel comfortable.

There's no shortcut for knowing which category a phrasal verb belongs to — it comes with practice and a good learner's dictionary, which usually marks it for you (often shown as sep. or with "sth/sb" placed between the verb and particle for separable ones).

Common mistakes

  • ❌ Can you turn off it? → ✅ Can you turn it off? (a pronoun object must go between a separable phrasal verb and its particle)
  • ❌ She looks the kids after. → ✅ She looks after the kids. (look after is inseparable — the object never goes in the middle)
  • ❌ I'll give up it. → ✅ I'll give it up. (same rule as turn off — pronoun in the middle)
  • ❌ I need find out the answer. → ✅ I need to find out the answer. (need is followed by to + verb: need to find out, exactly as with any other verb)

Quick check

Rewrite each sentence, replacing the underlined noun with a pronoun in the correct position.

  1. Please turn off the TV.
  2. Can you look after my dog this weekend?
  3. She picked up the keys and left.
  4. I ran into my old teacher yesterday.
Show answers
  1. Please turn it off.
  2. Can you look after it this weekend? (look after is inseparable — the pronoun still goes after)
  3. She picked them up and left.
  4. I ran into her yesterday. (run into is inseparable — the pronoun still goes after)

Key takeaways

  • A phrasal verb is a verb + particle (turn off, look after) whose meaning is often idiomatic, not literal.
  • Intransitive phrasal verbs (wake up, sit down) take no object at all.
  • Separable phrasal verbs let a noun object go before or after the particle, but a pronoun object must go in the middle: ✅ turn it off, never ❌ turn off it.
  • Inseparable phrasal verbs never split — the object, noun or pronoun, always comes after the particle: look after them.
  • Learn each phrasal verb as a whole chunk, including whether it's separable — there's no rule that predicts it from the words alone.