Grammar · Punctuation & Mechanics
Hyphens, En Dashes & Em Dashes
Three short lines, three different jobs: joining words, linking ranges and breaking into a sentence. Learn them with Wes Anderson’s film Moonrise Kingdom.
Grammar › Punctuation & Mechanics › Hyphens, En Dashes & Em Dashes
The rule in one sentenceA hyphen (-) glues words together into one unit, as in twelve-year-old, while a dash is longer and works between ideas: the en dash (–) links ranges like 1965–1966, and the em dash (—) interrupts a sentence.
About the film
Moonrise Kingdom is a 2012 comedy-drama by Wes Anderson, set on a small island off the coast of New England in 1965. Sam is a twelve-year-old Khaki Scout at a summer camp, and Suzy is a quiet, serious girl who loves reading. After a year of secret letters, the two make a plan — and one morning they both run away together.
What does it do?
Most keyboards have only one short line, but written English uses three, and each one has its own length and its own job. The hyphen is the shortest. It works inside a phrase, joining words so that the reader sees them as one idea: a well-planned escape, a left-handed girl.
A dash is longer, and it works between things. The en dash (–), about as wide as the letter n, links the two ends of a range or two equal partners. The em dash (—), as wide as an m, opens a gap in a sentence for an extra thought, a surprise or a dramatic pause.
Look at the first and third tiles. The hyphenated words come before a noun and describe it together, like one long adjective. In the second and fourth tiles the dash does something different: it adds a list after a pause, or it means from … to.
Sam and Suzy become pen pals — and a year later they make a secret plan.
They share a carefully-kept secret. ❌ They share a carefully kept secret. ✅
The em dash adds drama, as if the narrator stops for a second before the big news. The second pair shows a trap: after a word ending in -ly, you do not need a hyphen, because the -ly already tells the reader how the words connect.
Visual guide
Teacher Teddy’s illustrated guide to this rule is being drawn — the full swipe-through infographic will appear here soon.
How to make it
hyphen — join the words
Sam is a twelve-year-old scout.
Before the noun: hyphens, and “year” stays singular.Sam is not a well-liked member of his troop.
Negative sentences work in exactly the same way.Is Suzy a book-loving girl?
Yes – she even packs a suitcase of books.dash — link or interrupt
Suzy takes a few things — books, a record player and a kitten.
Sam does not wait — he leaves the camp before breakfast.
The em dash can replace a colon or “because”.Where are the children — and who has seen them?
A dash can come before a second question.When to use each one
hyphen — one unit
dash — a range, a link or a break
Words that help: hyphen or dash?
Some patterns almost always need one mark or the other. Learn to spot them.
hyphen → these words join up
dash → these ideas need space
Common mistakes
❌ Sam is a twelve year old orphan who lives with foster parents.
✅ Sam is a twelve-year-old orphan who lives with foster parents.
Before the noun, the three words work as one adjective, so they need two hyphens.
❌ Suzy is twelve-years-old, like Sam.
✅ Suzy is twelve years old, like Sam.
After the verb there is no noun to describe, so the hyphens go and “years” is plural.
❌ Suzy packs her bag – books, binoculars and a kitten.
✅ Suzy packs her bag — books, binoculars and a kitten.
A single hyphen with spaces is a typing habit. For a pause, use a real dash.
❌ Sam is a highly-skilled scout.
✅ Sam is a highly skilled scout.
Never use a hyphen after an adverb ending in -ly: highly skilled, carefully planned.
One more thing
This part is more advanced, so feel free to come back to it later.
British and American styles differ, and an en dash can join longer names. American editors usually write a closed em dash (Sam—and Suzy), while many British editors prefer a spaced en dash (Sam – and Suzy). Either is fine if you are consistent. When a compound already contains a space, careful writers attach it with an en dash rather than a hyphen, so the whole name stays together.
✅ Moonrise Kingdom is a perfect Wes Anderson–style film. (the style of Wes Anderson)
✅ It is a coming-of-age story with a hand-drawn feel. (ordinary hyphens)
Practice: hyphen or dash?
Eight questions. Choose the version you would actually write, and you will see why.
1. Sam is a ___ scout.
Before the noun “scout”, the words join with hyphens.
2. Suzy is ___.
No noun follows, so no hyphens, and “years” is plural.
3. Which mark goes in “pages 40___60”?
A range from one number to another takes an en dash.
4. Suzy packs her bag ___ books, binoculars and a kitten.
A pause before extra information takes a dash, not a hyphen.
5. Which is correct?
No hyphen after an -ly adverb.
6. Which is correct?
After the verb “is”, the words stand apart.
7. How do you write 65 in words?
Numbers from twenty-one to ninety-nine take a hyphen.
8. Which mark joins two equal partners, as in “the Sam___Suzy letters”?
Two sides of a connection are linked with an en dash.
Your turn
Choose one ending. Then listen to your sentence.
Every sentence here is correct, and every hyphen joins words that come before a noun. Pick the one that is true for you and say it out loud.
Keep going
More lessons
Practise listening at your level
Hear this grammar used for real — Advanced English listening practice. Full movie reviews in slow, clear English, levelled for Advanced learners. One new episode every week, free, with a transcript. AdvancedFree playlistWatch on YouTube