Grammar and Punctuation Notes | Junior Cycle English

Grammar and punctuation establish sentence boundaries, ensuring your writing conveys its intended meaning with clarity and precision. In the Junior Cycle English examination, questions may ask you to correct errors, choose words, or judge punctuation, and accurate grammar and punctuation help make your answers clear.

Sentence Boundaries and Syntax

A full sentence expresses a complete idea, usually with a subject and verb: The rain stopped.

A simple sentence has one main clause and no subordinate clauses: Rain fell.
A compound sentence joins main clauses: Rain fell, so we sheltered.
A complex sentence contains a main clause and a subordinate clause: We sheltered because rain was falling.
A main clause stands alone; a subordinate clause depends on the main clause to make full sense.
A comma splice wrongly joins two main clauses with only a comma: It rained, we stayed inside.
Fix a comma splice with a full stop, a semicolon, or a coordinating conjunction (so, and, but).
Starting with a subordinate clause changes emphasis: As she quietly closed the door, she crept downstairs.
In “The empty corridor stretched into darkness. I froze”, the short sentence emphasises sudden fear.

Apostrophes and Capital Letters

Use apostrophes to show possession or mark omitted letters.

Function	Rule	Example
Singular possession	Add 's to the singular noun	The boy's coat
Plural possession ending in s	Add only an apostrophe after the s	The boys' coats
Irregular plural possession	Add 's to plural nouns not ending in s	The children's books
Contraction	Place apostrophe where letters are omitted	do not → don't

Never use an apostrophe to form an ordinary plural: write three apples, not three apple's.
It's always means it is or it has; its shows possession without an apostrophe (The dog wagged its tail).
Capitalise sentence beginnings, I, proper names, days, and months.
Start a complete spoken sentence with a capital letter: "I am," she said, "ready to leave."

Punctuation and Paragraphing

Punctuation marks sentence structure; never insert a comma simply to take a breath.

Use commas to separate items in a list and to mark off introductory clauses or parenthetical phrases.
A semicolon connects two closely related main clauses without a conjunction: The bell rang; class was over.
A colon introduces a list or an explanation: She bought three essentials: bread, milk, and fruit.
Direct questions always end with a question mark: Where did you go?
Put punctuation belonging to the spoken words inside speech marks: "Ready?" she asked. "Yes," he replied.
Start a new paragraph for a new main idea or speaker; time and place changes can also signal breaks.
Show paragraph breaks with an indent or a clear line space.

Agreement, Register, and Homophones

Accurate writing needs consistent tenses, correct subject-verb agreement, and words suited to context.

A singular subject takes a singular verb; a plural subject takes a plural verb.
In There are some people, 'people' is plural, so the verb must be are.
In The box of medals is heavy, the subject is the singular noun box, not medals.
Adjust register to suit your audience and purpose. Informal message: Coming tonight? Formal request: Will you attend this evening?
Know these frequently confused homophone pairs tested in SEC papers:
accept (to receive or agree to) vs except (excluding)
allowed (permitted) vs aloud (spoken out loud)
alter (to change) vs altar (table in a church)
licence (the noun: driver's licence) vs license (the verb: to permit)
pier (structure over water) vs peer (to look closely, or an equal)

Editing and Proofreading Craft

Editing is an ongoing skill used throughout the writing process to improve meaning and impact.

Edit as you write: change wording, reorder clauses, and remodel sentences to make your meaning clearer.
Check short answers immediately after writing them.
Leave a few minutes at the end of the examination to proofread longer answers.
Target your own recurring errors during proofreading: check sentence boundaries, agreement, apostrophes, and spelling.
Verify common word splits: write a lot as two separate words, never alot.

Key terms

Syntax: The arrangement of words and phrases to form grammatically correct and effective sentences.
Main (independent) clause: A group of words containing a subject and verb that expresses a complete thought and can stand alone as a sentence.
Comma splice: The grammatical error of joining two independent clauses with only a comma instead of a full stop, semicolon, or conjunction.
Contraction: A shortened word form in which missing letters are replaced by an apostrophe.
Subject-verb agreement: The grammatical rule requiring a verb to match the grammatical number of its subject.
Homophone: A word that sounds identical to another word but has a different spelling and meaning.
Register: The style and variety of language chosen to suit a specific audience, context, and purpose.
Proofreading: Rereading a completed text carefully to identify and correct errors in spelling, punctuation, and grammar.

Check yourself

What is the correct possessive form for a staffroom shared by several teachers?
Teachers' staffroom (the apostrophe is placed after the plural 's').
Why is 'The crate of fresh oranges were delivered' incorrect?
The true subject is the singular noun 'crate', which requires the singular verb 'was delivered'.
How can you fix a comma splice without adding or changing any words?
Replace the comma with a full stop (capitalising the next word) or a semicolon.
Which word correctly completes the sentence: 'He had to (alter / altar) his uniform'?
Alter (meaning to change; 'altar' is a table in a church).
What changes can signal a new paragraph?
A new main idea, speaker, time or place.

Grammar and Punctuation