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Grammar6-minute readUpdated 2026-07

Inseparable vs Separable Phrasal Verbs: The Pattern That Bleeds Marks

Phrasal verbs confuse even strong writers — but the real trap is not knowing which ones you can split. This post drills the patterns, the logic, and the exam habits that save you from Band 6 mistakes.

Why Phrasal Verb Structure Matters for IELTS

Phrasal verbs are a double-edged sword. Used well, they lift your writing and speaking from textbook to natural. Used badly, they bleed marks under Grammatical Range and Accuracy. The main trap isn’t choosing the wrong verb — it’s splitting when you shouldn’t, or failing to split when you must. Examiners see these errors as a sign of memorised language, not mastery.

The Split/No-Split Rule

Every phrasal verb falls into two main camps: separable and inseparable. Separable phrasal verbs allow you to put the object between the verb and the particle, but inseparable ones do not. For example, you can say 'turn off the lights' or 'turn the lights off' — but you cannot say 'look the information up' with 'look for'. This is the split/no-split rule, and it’s non-negotiable in the exam.

  • Separable: call off (cancel), put off (postpone), pick up (collect)
  • Inseparable: look after (care for), run into (meet by chance), get over (recover from)
Image pending — A simple chart showing examples of separable and inseparable phrasal verbs with arrows indicating object placement.

Concrete Examples: Band 6.5 vs Band 7+

Band 6.5

She looked up the children after the meeting. (wrong: 'look after' is inseparable)

Band 7+

She looked after the children after the meeting. (correct: inseparable, object after)

Notice how the Band 6.5 version tries to force the object between the verb and the particle — a classic error with inseparable phrasal verbs. Examiners see this and mark down for accuracy. The Band 7+ version applies the rule: object always follows the full inseparable phrasal verb.

Quiz: Can You Split It?

Separable or Inseparable?

  1. 1

    Which sentence is correct?

    Pick one. You'll see why straight away.

  2. 2

    Is 'run into' separable or inseparable?

    Pick one. You'll see why straight away.

  3. 3

    Choose the correct form: 'He got ___ the flu quickly.'

    Pick one. You'll see why straight away.

IELTS examiners are trained to spot memorised language. Using phrasal verbs naturally — and splitting only when the verb allows — is a signal of real fluency. The split/no-split rule is not just grammar trivia; it’s the difference between sounding like a textbook and sounding like a person.

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