Grammar guide Updated 2026-10-11
Punctuation Rules: A Practical Teaching Guide
Punctuation is a set of signals rather than a list of symbols. A full stop says that a thought has finished, a comma says that the sentence is still running, and an apostrophe says who owns what. Taught as signals, the marks stop looking like decoration and start doing a job.
Start with the job, not the symbol
Most students meet punctuation as a checklist, and a checklist is hard to use while writing. Functions are easier. Every mark in English does one of three jobs: it ends a unit, it joins two units, or it marks a relationship such as possession or omission. If a student can name the job a sentence needs, the mark is usually settled.
Stops: full stop, question mark, exclamation mark
The full stop closes a statement, an instruction and a reported question. The question mark belongs to direct questions only: Where is the station? A frequent slip at B1 is a question mark on a reported question. He asked where the station was. takes a full stop, because the sentence reports rather than asks. The question forms guide sets out that difference with practice frames.
The exclamation mark adds force but loses it through overuse.
Commas: three jobs to teach first
A comma separates items of the same kind in a list: We bought bread, cheese, apples and milk. The comma before and is optional in a short list, but add it when the items are long.
After an introductory phrase or clause, a comma marks where the main clause begins: After the bell rang, the class left. Without it, a reader can start in the wrong place.
A non-defining clause is wrapped in commas: My brother, who lives in Leeds, drives a van. Remove the commas and the clause identifies which brother is meant. The relative clauses guide works through that pair.
Semicolon or comma?
A semicolon joins two complete clauses without a conjunction: The rain stopped; we went outside. A comma cannot do that job alone, and the result is the comma splice. There are three repairs: a full stop, a semicolon, or a comma plus and, but or so.
The colon: lists and explanations
A colon says that a list or an explanation is coming, and whatever stands in front of it must already be a complete clause: She packed three things: a map, a torch and a flask. A colon straight after a verb reads wrong, as in She packed: a map.
The apostrophe: two jobs, no exceptions
An apostrophe marks a contraction or a possessive and nothing else. Contractions: do not becomes don't, it is becomes it's. Possessives: the teacher's desk, the students' books, the children's coats. The trap is a plain plural, which takes no apostrophe at all: apples for sale, the 1990s. The apostrophes and possessives guide lists the cases, including the its and it's pair.
Quotation marks: British and American
American style puts commas and full stops inside the quotation marks: She said, "I am ready." British style often keeps them outside unless they belong to the quoted words. Both are correct; mixing the two inside one paragraph reads as uncertain, so choose a class convention.
Hyphen, dash and en dash
The hyphen joins words that behave as a single unit before a noun: a well-known author, a two-hour lesson. After a linking verb it disappears: The author is well known. The dash marks an aside, and the en dash shows a range, as in pages 10–20. Three marks, three jobs, and none of them is a comma.
Three error patterns students share
- The comma splice. Two complete clauses joined by a comma alone.
- A comma in front of a question. Could you tell me, where the bank is? The comma and the question mark both have to go.
- Quotation marks that open in one style and close in another.
A three-step teaching sequence
- Give a rule card. One card, three jobs: ending, joining, marking. Anything else stays off it for now.
- Take a short text with the punctuation removed, about 120 words, and ask pairs to put the marks back.
- Correct only the marks that changed the meaning. Leave the rest for a later lesson, or the writer learns that every mark is a mistake.
Three classroom drills
- Read for breaks. Read a paragraph aloud without pausing and ask the class where a mark must fall. Then read it again with the marks they chose.
- Error relay. Teams get one sentence each and three minutes to find the wrong marks; the team that explains why scores the point.
- One sentence, two meanings. Write Let's eat, Grandma. beside Let's eat Grandma. Students explain the difference before you say anything.
What A2 and B1 students should control
At A2, expect capital letters, full stops, question marks and apostrophes in the common contractions. At B1, add commas in lists and after long openers, quotation marks, and the hyphen in compound adjectives. Asking an A2 writer for a semicolon invites guesswork.
Six errors to put on the board
- A comma splice.
- A question mark on a reported question.
- A colon straight after a verb.
- An apostrophe on a plain plural, as in apple's for sale.
- British and American quotation style mixed in one paragraph.
- No comma after an introductory clause of eight words or more.
Three teaching traps
- Teaching every mark in one lesson. Stops first, then commas, then quotes.
- Rules without a text. A rule sticks when the student has just repaired a sentence with it.
- Random corrections. Mixed British and American feedback reads as inconsistent.
Frequently asked questions
Should I teach British and American quotation rules together?
No. Pick the convention used in your own materials and correct against that one only. Offering both in the same lesson usually produces mixed usage rather than a deliberate choice.
What is a comma splice?
A comma splice joins two complete clauses with a comma alone, as in The rain stopped, we went out. Repair it with a full stop, a semicolon, or a comma plus and, but or so.
Why do students put a comma in front of a question?
Because the question sits inside a longer sentence. Could you tell me, where the bank is? takes no comma and no question mark, since the whole sentence is a polite request rather than a direct question.
Should I correct every punctuation error in a piece of writing?
No. Mark the errors that change the meaning first, then choose one error type to work on over the next few weeks. A page covered in corrections teaches a student that the page is wrong, not how to repair it.
When should punctuation teaching start?
From the first lesson, with the three marks an A2 writer needs: the full stop, the question mark and the apostrophe in common contractions. Commas follow once students write more than one clause.