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A colon can be used to introduce some more information about something mentioned earlier in the sentence. For example:
- He wanted just one thing: revenge.
- He knew what his wish would be: the ability to turn stones into gold.
- He wanted just one thing: he wanted it since he was boy.
- He wanted just one thing. He wanted it since he was boy.
- He wanted just one thing; he wanted it since he was boy.
Using a Colon to Extend a SentenceYou can use a colon to introduce words that offer a more detailed version of something previously mentioned in the sentence.
Examples of Colons Used in SentencesHere are some examples of colons used correctly and incorrectly in sentences:
- The cat's fur was found in two rooms: the bedroom and the kitchen.
- His success is attributed to one thing: determination.
- It is by the fortune of God that we have three benefits: freedom of speech, freedom of thought, and the wisdom never to use either. (Mark Twain)
- He will be the winner of Loughborough's oldest award: the Arthur Scotland Trophy.
- Ian had caught 3 fish: a perch and 2 gudgeon.
- Ian had caught 3 fish: this was the first time he had been fishing. (You cannot use a colon to introduce a new idea.)
- Janice liked to talk: she often exaggerated. (Remember, a colon introduces an idea previously mentioned in the sentence.)
- Janice liked to talk. She often exaggerated. (A new idea is introduced with a new sentence.)
- Janice liked to talk; she often exaggerated. (When a slight break is preferable to a new sentence, you can use a semicolon to introduce a new idea, but you cannot use a colon.)
- I have made an important discovery: alcohol, taken in sufficient quantities, produces all the effects of intoxication. (Oscar Wilde)
- In this world, there are only two tragedies: one is not getting what one wants, and the other is getting it. (Oscar Wilde)
This should be:
"Dot arrived late at Roger's dinner party; she was determined..."
"Dot arrived late at Roger's dinner party. She was determined..."
"Dot arrived late at Roger's dinner party: she was determined..."
Very Occasionally, You Have a Choice between a Semicolon and a ColonIt's not common, but sometimes it is unclear whether the words to the right of the colon are an extension of something to the left or a new idea. Below is an example where either a colon or a semicolon would be acceptable. This doesn't happen too often.
- No one was seriously hurt in the accident; one man broke his index finger.
- No one was seriously hurt in the accident: one man broke his index finger.