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English · Punctuation

Use a colon

Place a colon between a complete lead-in and its explanation or list.

Watch the worked example

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This video shows how to place a colon after a complete lead-in to introduce an explanation or a list. Watch an 11+ English question solved step by step.

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Quick quiz: Use a colon

10 questions, with feedback after each one. No sign-up needed.

Read the questions in this quiz
  1. Question 1

    Which version uses a full stop to separate two complete sentences?

    • A.The whistle went far too late: Jonas had already stopped running.
    • B.The whistle went far too late, Jonas had already stopped running.
    • C.The whistle went far too late Jonas had already stopped running.
    • D.The whistle went far too late. Jonas had already stopped running.
  2. Question 2

    Which version uses a full stop to separate two complete sentences?

    • A.The rain stopped at noon. Amara opened all the windows.
    • B.The rain stopped at noon Amara opened all the windows.
    • C.The rain stopped at noon: Amara opened all the windows.
    • D.The rain stopped at noon, Amara opened all the windows.
  3. Question 3

    Which version uses a colon to introduce the promised name or list?

    • A.Three judges had already agreed; Mia, Amara and Priya.
    • B.Three judges had already agreed. Mia, Amara and Priya.
    • C.Three judges had already agreed, Mia, Amara and Priya.
    • D.Three judges had already agreed: Mia, Amara and Priya.
  4. Question 4

    Which version uses a colon to introduce the promised name or list?

    • A.One of us had known all along; Mia.
    • B.One of us had known all along: Mia.
    • C.One of us had known all along. Mia.
    • D.One of us had known all along Mia.
  5. Question 5

    Which version uses a colon to introduce the promised name or list?

    • A.Three things had been left behind; Rosa's water bottle, Yusuf's spare gloves and Devan's kit bag.
    • B.Three things had been left behind. Rosa's water bottle, Yusuf's spare gloves and Devan's kit bag.
    • C.Three things had been left behind: Rosa's water bottle, Yusuf's spare gloves and Devan's kit bag.
    • D.Three things had been left behind, Rosa's water bottle, Yusuf's spare gloves and Devan's kit bag.
  6. Question 6

    Which version uses a full stop to separate two complete sentences?

    • A.The rain stopped at noon. Omar opened all the windows.
    • B.The rain stopped at noon, Omar opened all the windows.
    • C.The rain stopped at noon Omar opened all the windows.
    • D.The rain stopped at noon: Omar opened all the windows.
  7. Question 7

    Which version uses a colon to introduce the promised name or list?

    • A.Three of us were missing: Kofi, Jonas and Ellis.
    • B.Three of us were missing, Kofi, Jonas and Ellis.
    • C.Three of us were missing. Kofi, Jonas and Ellis.
    • D.Three of us were missing; Kofi, Jonas and Ellis.
  8. Question 8

    Which version uses a colon to introduce the promised name or list?

    • A.There was only one problem; Callum's soaking wet raincoat.
    • B.There was only one problem Callum's soaking wet raincoat.
    • C.There was only one problem. Callum's soaking wet raincoat.
    • D.There was only one problem: Callum's soaking wet raincoat.
  9. Question 9

    Which version uses a colon to introduce the promised name or list?

    • A.Three things had been left behind, Rosa's lunch card, Jonas's spare gloves and Idris's water bottle.
    • B.Three things had been left behind; Rosa's lunch card, Jonas's spare gloves and Idris's water bottle.
    • C.Three things had been left behind. Rosa's lunch card, Jonas's spare gloves and Idris's water bottle.
    • D.Three things had been left behind: Rosa's lunch card, Jonas's spare gloves and Idris's water bottle.
  10. Question 10

    Which version uses a full stop to separate two complete sentences?

    • A.The hall was already full Omar found us three chairs.
    • B.The hall was already full: Omar found us three chairs.
    • C.The hall was already full, Omar found us three chairs.
    • D.The hall was already full. Omar found us three chairs.

Practise it now

Three marks are missing. Pick one from the tray, then tap the hole it belongs in.

This exercise practises use a colon alongside its own main skill, Punctuation.

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A worked example

One question of the kind this skill is tested with, worked all the way through: the reasoning, and what the wrong answers are there to catch.

Worked example: Colon or full stop?

Worked example: Which version uses a colon to introduce the promised name or list?

  1. Only one person could have opened it. Idris.
  2. Only one person could have opened it; Idris.
  3. Only one person could have opened it Idris.
  4. Only one person could have opened it: Idris.

Answer: Only one person could have opened it: Idris.

How you get there

"Only one person could have opened it" makes a promise, and "Idris" is the thing it promised. A colon is the mark that delivers a promise, so it goes between them. A full stop is wrong because "Idris" is not a sentence on its own - it has no verb of its own to stand on - so a full stop leaves it stranded.

Why the other answers tempt

A capital letter after the mark is no help at all here: every second half starts with a name, so it looks the same either way.

If they are stuck, say this

Read which mark the question asks for. A colon can introduce a name, a list or an explanation. A full stop separates complete sentences.

Now do it live in Punctuation Pinball

What this exercise is doing

Punctuation Pinball

Three marks are missing. Pick one from the tray, then tap the hole it belongs in.

This engine’s own main skill is Punctuation. It practises use a colon alongside it.

Punctuation is the writing down of your voice. Read "Slow down Ben you will trip" aloud and you will hear two small pauses and one urgent ending. When you speak straight to somebody by name, that name gets a comma on each side to fence it off from the rest, which is why Ben needs one before and one after: without them, "Slow down Ben" sounds like Ben is the thing being slowed down. The ending is chosen by tone, and a warning shouted at somebody about to fall takes an exclamation mark rather than a full stop. Say the sentence, mark the pauses, then choose the ending that matches the feeling.

What to say if they get stuck

  1. Read it out loud. Every place your voice pauses is a hole that wants a comma.
  2. Ben is being spoken to, not talked about. A name you are addressing gets fenced off on both sides.
  3. The last hole ends the whole thing. Is this a calm statement or a shout of warning?

Open Punctuation Pinball on its own page to share it

How use a colon differs from the skills beside it

The same exercise practises several skills, and telling them apart is often the difficulty rather than the exercise itself. On this page the skill is: place a colon between a complete lead-in and its explanation or list, and it stops where the text before the colon must stand as a complete clause.

  • Mark possession

    Place an apostrophe for singular or plural possession. Excludes contractions unless contrasted explicitly.

  • Mark a sentence boundary

    Choose punctuation that correctly ends or joins complete clauses. Excludes internal list and speech punctuation.

  • Punctuate direct address

    Place the commas that separate a named addressee from the rest of the sentence. Excludes vocative-free openers and list commas.

  • Punctuate direct speech

    Place the required punctuation around one direct-speech construction. Excludes rewriting dialogue content.

  • Punctuate a list

    Use commas or a colon correctly for one list construction. Excludes semicolon-separated complex lists.

Related english skills

All english 11+ skills

Questions parents ask about use a colon

What this skill involves, common mistakes and ways to practise it at home.

Place a colon between a complete lead-in and its explanation or list. It is one of 41 named English skills in the 11+, in the punctuation strand, and this page carries 1 interactive exercise that practises it.

Comprehension, vocabulary, grammar and punctuation are four different problems

A free diagnostic separates them, so practice goes where the gap actually is rather than on whichever one is easiest to set.