Y05W02GR Simple sentences (core)

Simple sentences (core)

Every sentence needs two things to work: a subject and a verb. When those two parts are clear, writing becomes much easier to read and understand. Building strong simple sentences is the foundation of all good writing.

You’ll learn
  • What makes a sentence complete (subject + verb)
  • How to spot and fix a sentence fragment
  • How to add one detail to expand a simple sentence
Core ideas
  • Sentence — a group of words with a subject and a verb that expresses a complete idea.
  • Subject — the person, animal or thing the sentence is about. For example, The dog in The dog barked.
  • Verb — the action or state word in the sentence. For example, barked in The dog barked.
  • Fragment — a group of words missing a subject or verb, leaving the idea incomplete.

How it works

1The subject and verb work together

Every sentence must have both a subject and a verb. Without one of them, the sentence is a fragment — it leaves the reader waiting for more.

  • Subject identifies who or what the sentence is about. For example, Maya is the subject in Maya kicked the ball.
  • Verb tells the reader what is happening. For example, kicked is the verb in Maya kicked the ball.
  • Fragment is missing one of these parts. For example, Ran across the oval. has no subject — the reader doesn't know who ran.

2Spotting a fragment

A fragment often feels like half an idea. Spotting them helps writers fix mistakes before they confuse the reader.

  • Missing subject means no one is doing the action. For example, Dropped the lunch tray. doesn't tell us who dropped it.
  • Missing verb means nothing happens in the sentence. For example, The new student at the canteen. is incomplete because there is no action.

3Expanding a simple sentence

A simple sentence can be short and still correct. Adding one detail — a when, where or how — makes it more interesting without making it messy.

  • Detail word or phrase adds useful information. For example, The bell rang becomes The bell rang loudly at 3 o'clock.
  • One addition keeps the sentence clear and focused — adding too many details at once makes a sentence hard to follow.

See it in action

Fragment missing a subject

Before

Ran straight to the canteen.

After ✓

Liam ran straight to the canteen.

Adding Liam gives the sentence a clear subject so the idea is complete.

Fragment missing a verb

Before

The tall boy near the fence.

After ✓

The tall boy near the fence waited for his friend.

Adding waited for his friend completes the idea with a verb and an action.

Expanding a simple sentence

Before

It rained.

After ✓

It rained heavily during sport.

Adding heavily during sport gives useful detail without losing clarity.

Quick check
  • A sentence must have a subject and a verb to be complete.
  • The subject tells us who or what the sentence is about.
  • The verb tells us the action or state in the sentence.
  • A fragment is incomplete — it is missing a subject, a verb, or both.
  • Adding one small detail can improve a sentence without making it confusing.
Metalanguage
  • sentence(n.) a group of words with a subject and a verb that makes a complete idea — The siren sounded works because both parts are present.
  • fragment(n.) an incomplete group of words missing a subject or verb — After the game is a fragment because no action or subject is stated.
  • subject(n.) the person, animal or thing the sentence is about — in The coach blew the whistle, the coach is the subject.
  • verb(n.) the word showing the action or state — in She smiled, smiled is the verb.