Grammar: Sentence Types and Clauses

Strong grammar is essential for the FSCE 11+ exam. In the comprehension section, you need to write answers in well-structured sentences. In the writing section, you need to show variety and control. This lesson covers the sentence types and clause structures that will help you succeed.

Why Sentence Variety Matters for the FSCE

The FSCE examiners are looking for writing that shows control and variety. If every sentence you write follows the same pattern, your writing will sound flat and repetitive — even if your ideas are good. By mixing different sentence types, you create writing that flows well and keeps the reader engaged.

The Three Main Sentence Types

1. Simple Sentences

A simple sentence contains one main clause — one subject and one verb. It expresses one complete thought.

Examples:

• The dog barked. (Subject: the dog. Verb: barked.)
• Rain fell heavily. (Subject: rain. Verb: fell.)
• The children played in the garden. (Subject: the children. Verb: played.)

When to use them: Simple sentences are great for dramatic impact, clarity, and emphasis. Short, punchy simple sentences stand out, especially after longer sentences.

The forest was dark and full of strange noises. Twigs snapped. Leaves rustled. Something moved in the shadows. He froze.

Notice how the short simple sentences create tension and drama.

2. Compound Sentences

A compound sentence contains two or more main clauses joined by a coordinating conjunction.

The coordinating conjunctions are remembered using FANBOYS:

• For
• And
• Nor
• But
• Or
• Yet
• So

Examples:

• The sun was shining, and the birds were singing.
• She wanted to go outside, but it was raining.
• He could read a book, or he could watch a film.

Key rule: Both parts of a compound sentence could stand alone as complete sentences. A comma usually comes before the conjunction.

3. Complex Sentences

A complex sentence contains one main clause and one or more subordinate clauses. The subordinate clause depends on the main clause — it cannot stand alone as a sentence.

Examples:

• Although it was raining, the children went outside to play.
• The boy who lived next door was always friendly.
• She finished her homework before dinner was ready.

When to use them: Complex sentences show mature writing. They allow you to add detail, explain reasons, and connect ideas in sophisticated ways.

Understanding Clauses

graph TD
    A["CLAUSE<br/>A group of words containing<br/>a subject and a verb"] --> B["MAIN CLAUSE<br/>Makes sense on its own<br/>Example: The cat sat on the mat"]
    A --> C["SUBORDINATE CLAUSE<br/>Does NOT make sense on its own<br/>Example: because it was tired"]
    C --> D["Adverbial Clause<br/>Tells when, where, why, how<br/>Example: When the bell rang..."]
    C --> E["Relative Clause<br/>Gives extra info about a noun<br/>Example: ...who was very tall..."]
    C --> F["Noun Clause<br/>Acts as a noun<br/>Example: What she said was true"]

Main Clauses

A main clause (also called an independent clause) makes complete sense on its own. Every sentence must have at least one main clause.

• The teacher smiled. (This is a main clause — it makes sense on its own.)
• She opened the door. (Main clause.)

Subordinate Clauses

A subordinate clause (also called a dependent clause) does not make complete sense on its own. It needs a main clause to complete the meaning.

• Because it was cold... (This does not make sense alone — because what? What happened because it was cold?)
• The children stayed inside because it was cold. (Now it makes sense — the main clause "the children stayed inside" completes the meaning.)

Subordinating Conjunctions

Subordinate clauses begin with subordinating conjunctions. Here are the most common:

Category	Conjunctions
Time	when, while, before, after, until, as soon as, whenever
Reason	because, since, as
Condition	if, unless, provided that, as long as
Contrast	although, though, even though, whereas, while
Purpose	so that, in order to

Relative Clauses

A relative clause gives extra information about a noun. It begins with a relative pronoun: who, which, that, whose, where, when.

Examples:

• The girl who won the race was only ten years old. ("who won the race" tells us more about the girl.)
• The book, which was very old, fell apart. ("which was very old" gives extra information about the book.)
• The house where I grew up has been demolished. ("where I grew up" tells us about the house.)

Embedded relative clauses sit in the middle of the main clause, between commas:

• The teacher, who had been at the school for twenty years, announced her retirement.

Worked Examples

Worked Example 1: Identifying Sentence Types

Sentence: The storm raged all night, but the old house stood firm. Type: Compound — Two main clauses ("The storm raged all night" and "the old house stood firm") joined by the coordinating conjunction "but."

Worked Example 2: Identifying Sentence Types

Sentence: Although she was exhausted, Maria finished the marathon. Type: Complex — One subordinate clause ("Although she was exhausted") and one main clause ("Maria finished the marathon") joined by the subordinating conjunction "although."

Worked Example 3: Identifying Clauses

Sentence: The dog, which had been barking all morning, finally fell asleep when its owner came home.

• Main clause: "The dog finally fell asleep"
• Relative clause: "which had been barking all morning" (gives extra information about the dog)
• Adverbial clause: "when its owner came home" (tells us when the dog fell asleep)

Worked Example 4: Combining Simple Sentences

Original: The boy was cold. He put on his coat. He went outside.

Combined into a complex sentence: Because the boy was cold, he put on his coat before going outside.

This is much better because it shows the relationship between the ideas (the reason he put on his coat, and the order of events).

Worked Example 5: Improving Writing with Sentence Variety

Before (all simple sentences): The castle was old. It stood on a hill. The walls were crumbling. Ivy grew up the sides. No one lived there.

After (mixed sentence types): The ancient castle, which had stood on the hill for centuries, was slowly crumbling. Although ivy grew up its weathered sides, no one had lived there for years, and the empty windows stared out like hollow eyes.

The improved version uses a complex sentence with a relative clause, then a complex-compound sentence. It flows much better and is far more engaging to read.

Worked Example 6: Writing a Complex Sentence from Scratch

Task: Write a complex sentence about a storm.

Answer: As the thunder rumbled overhead, the children huddled together under the blanket, trembling with every flash of lightning that lit up the dark room.

This sentence has:

• An adverbial clause: "As the thunder rumbled overhead"
• A main clause: "the children huddled together under the blanket"
• A participial phrase: "trembling with every flash of lightning"
• A relative clause: "that lit up the dark room"

Common Mistakes