Semicolons: Usage, Examples, and Exercises

A semicolon (;) does two jobs in English. It joins two complete sentences that are closely related, without “and”, “but” or “so”: I have a big test tomorrow; I can’t go out tonight. And it separates items in a list when the items already contain commas: We visited Lisbon, Portugal; Seville, Spain; and Rome, Italy. If you could put a full stop where the semicolon is, you have probably used it correctly. Below are 70 numbered example sentences across the three uses, the mistakes that make a semicolon wrong, and a quick comparison with commas, colons and dashes.

The quick test

• Cover the semicolon. Is the part before it a complete sentence? Is the part after it a complete sentence? If both are yes, a semicolon can go there.
• Is there an “and”, “but”, “or” or “so” right after it? Then you usually need a comma, not a semicolon.
• Is it a list? Use semicolons between items only if some items already have commas inside them.

One more rule: the word after a semicolon starts with a small letter, unless it is a name or “I”. A semicolon never ends a sentence and never comes at the start of one.

Use 1: joining two related sentences

The two halves must be complete sentences (each has a subject and a verb and can stand alone), and they must be closely connected in meaning. The semicolon tells the reader: “these belong together”.

Cause and result

1. It rained all night; the river burst its banks.
2. I missed the bus; I had to walk to work.
3. She practised every day; her playing improved quickly.
4. The battery was dead; the car wouldn’t start.
5. He forgot his umbrella; he arrived soaked.
6. The tickets sold out in an hour; we’ll have to watch it online.

Contrast

7. Some people love the summer; others can’t wait for winter.
8. My brother is tidy; I am not.
9. The first half was dull; the second half was brilliant.
10. Cats are independent; dogs need constant attention.
11. She wanted to stay; he wanted to leave.
12. The old phone was slow; the new one is lightning fast.

The second sentence explains or adds to the first

13. I can’t eat peanuts; I’m allergic.
14. The shop is closed today; it’s a public holiday.
15. Don’t touch the stove; it’s still hot.
16. We love this café; the coffee is excellent and the staff are friendly.
17. Learning a language takes time; there are no real shortcuts.
18. The museum was packed; every school in the city seemed to be there.
19. He’s a great teacher; he makes difficult ideas simple.
20. Our flight was delayed; a storm had closed the airport.

Balanced pairs

21. Some came by car; others came by train.
22. The morning was cold; the afternoon was warm.
23. Talk is cheap; actions are what count.
24. Yesterday I was tired; today I feel great.

Use 2: before however, therefore and other linking adverbs

Words like however, therefore, moreover, consequently, nevertheless, otherwise, instead, meanwhile and in fact are not conjunctions, so they cannot join two sentences with just a comma. Use a semicolon before them and a comma after them:

25. The plan was risky; however, it worked.
26. She trained for months; therefore, she was ready for the race.
27. The hotel was expensive; moreover, the rooms were dirty.
28. He didn’t study; consequently, he failed.
29. It was late; nevertheless, they kept working.
30. Wear a coat; otherwise, you’ll catch a cold.
31. We didn’t take the train; instead, we drove.
32. I cooked dinner; meanwhile, the kids set the table.
33. The task looked easy; in fact, it took all day.
34. Prices have risen; as a result, sales have fallen.
35. The data is incomplete; for example, March is missing.
36. I don’t mind the rain; besides, I’ve brought an umbrella.

The classic error here is the comma splice: The plan was risky, however, it worked. Two sentences are joined by a comma, which English does not allow. Fix it with a semicolon or a full stop: The plan was risky. However, it worked. See more in sentences with “however”.

Use 3: lists whose items already contain commas

When list items have commas inside them, commas alone would leave the reader guessing where each item ends. Semicolons act as “super-commas”:

37. The tour stops in Paris, France; Berlin, Germany; and Vienna, Austria.
38. The winners were Anna, the youngest player; Leo, the captain; and Sara, who had joined only last week.
39. Bring a torch, with spare batteries; a map; and warm, waterproof clothes.
40. The meetings are on Monday, 3 March; Wednesday, 5 March; and Friday, 7 March.
41. Our team includes Maria Lopez, designer; Tom Reed, developer; and Asha Patel, project manager.
42. I’ve lived in Leeds, a city in the north; Bristol, in the south-west; and now London.
43. The menu offers soup, served with bread; salad, with a choice of dressing; and pasta.
44. Past presidents of the club include Ruth Hall, 1998-2004; David Kim, 2004-2011; and Lena Ortiz, 2011-2020.

A semicolon goes before the final “and” in these lists. Do not use semicolons for a simple list: I bought apples; bread; and milk is wrong; commas are enough.

More examples by topic

School and study

45. The essay is due on Friday; I haven’t started it yet.
46. Maths is my strongest subject; chemistry is my weakest.
47. Read the question carefully; many marks are lost through misreading.
48. The library opens at nine; the computer room opens at ten.

Work

49. The deadline is tight; we’ll need everyone’s help.
50. Sales rose in spring; they dropped sharply in summer.
51. Please reply by Monday; after that, the offer expires.
52. Our office has moved; the new address is on the website.

Daily life

53. The fridge is empty; we need to go shopping.
54. My phone is charging; I’ll call you back in ten minutes.
55. The neighbours are having a party; I don’t think I’ll sleep tonight.
56. I love cooking; I hate washing up.

Travel and nature

57. The road was closed; we took the coastal route.
58. The mountain looked close; it was actually twenty kilometres away.
59. Spring has arrived; the trees are full of blossom.
60. The sea was calm; the boats stayed out until dark.

Essays and formal writing

61. The policy reduced traffic; it did not, however, reduce pollution.
62. Early results were promising; later trials were less clear.
63. The author admires the hero; the reader is not so sure.
64. Most respondents supported the change; a small minority opposed it strongly.
65. The evidence is limited; further research is needed.
66. Some historians blame the economy; others point to the war.
67. The novel is long; its plot, however, moves quickly.
68. Costs fell in the first year; savings in the second were smaller.
69. The theory explains the data well; it fails to predict new cases.
70. The city grew rapidly; its roads could not keep up.

Four ways to fix a run-on sentence

A run-on (or comma splice) puts two sentences together with no proper joint: My sister is a nurse, she works nights. There are four correct fixes, and the semicolon is only one of them:

1. Full stop: My sister is a nurse. She works nights.
2. Semicolon: My sister is a nurse; she works nights.
3. Comma + conjunction: My sister is a nurse, and she works nights.
4. Subordinate clause: My sister, who is a nurse, works nights. / Because she is a nurse, my sister works nights.

Choose the one that shows the relationship you mean. The semicolon suggests a close link without saying what kind; “and”, “so” or “because” say it exactly.

Semicolons with quotation marks and brackets

In English the semicolon goes outside closing quotation marks and brackets: She called it “a disaster”; I thought it was fine. / The report was late (again); nobody was surprised. This is true in both British and American English, even though American style puts commas and full stops inside quotation marks.

Sentences where a semicolon is wrong

Semicolon, comma, colon or dash?

Colon or semicolon? A colon points forward: what comes after it explains, lists or proves what came before. A semicolon links two equal ideas side by side. I have one rule: never skip breakfast (the second part spells out the rule) versus I never skip breakfast; my sister never eats it (two equal facts). For commas, see sentences with commas.

When to use one (and when not to)

• Use a semicolon when two sentences are so closely connected that a full stop feels like too strong a break, and “and” or “but” would add a meaning you don’t want.
• Use a full stop when in doubt. No sentence is wrong because it uses a full stop instead of a semicolon.
• Don’t overuse it. One or two semicolons in a paragraph look deliberate; five look like a habit.
• In informal writing (messages, emails to friends, most fiction dialogue) semicolons are rare. In essays, reports and formal writing they are common and useful.
• Spacing: no space before a semicolon, one space after it. (French puts a space before it; English does not.)

Practice

A. Semicolon, comma or colon?

1. I was exhausted ___ I went straight to bed.
2. I was exhausted ___ so I went straight to bed.
3. Pack the essentials ___ passport, tickets and money.
4. The talk was long ___ however, it was interesting.
5. We met Tom, the coach ___ Ana, the doctor ___ and Raj, the referee.

B. Correct the semicolon mistakes.

6. When the film ended; everyone clapped.
7. I bought eggs; flour; and sugar.
8. The bus was late, therefore, I missed the meeting.

Quick answers

When do you use a semicolon? To join two closely related complete sentences without a conjunction, before linking words like however or therefore between two sentences, and between list items that contain commas.

Do you capitalise after a semicolon? No, unless the next word is a proper noun or “I”.

Can a semicolon replace a comma? Only in complex lists. Elsewhere it replaces a full stop, not a comma.

Is it wrong to never use semicolons? No. Many good writers rarely use them; a full stop always works.

Can I use a semicolon before “because” or “which”? No. Both start a dependent clause that cannot stand alone. Write I stayed home because I was ill and We took the bus, which was late.

Can I use more than one semicolon in a sentence? In a complex list, yes, as many as there are items. Joining three or more sentences with semicolons is grammatical but usually hard to read; split it with a full stop.

Is a semicolon stronger than a comma? Yes. Think of a scale: comma (short pause), semicolon (longer pause, still the same sentence), full stop (new sentence).

How do other languages use it? Spanish uses the punto y coma in much the same way; see Spanish punctuation rules.