Mastering Sentence Structure: Coordination and Subordination

Understanding how to construct complex sentences is crucial for effective communication in English. Coordination and subordination are two fundamental techniques that allow you to combine ideas and create nuanced, sophisticated writing.

This article provides a comprehensive guide to these concepts, explaining their definitions, structural elements, types, and usage rules. Whether you’re a student, a writer, or simply someone looking to improve their English skills, this resource will equip you with the knowledge and tools to master coordination and subordination.

Introduction
Definitions: Coordination and Subordination
Structural Breakdown
Types and Categories
- Types of Coordination
- Types of Subordination
Examples
- Coordination Examples
- Subordination Examples
Usage Rules
Common Mistakes
Practice Exercises
Advanced Topics
- Sentence Variety
- Rhetorical Effect
FAQ
Conclusion

Definitions: Coordination and Subordination

Coordination involves joining two or more grammatically equal elements, such as words, phrases, or clauses, using coordinating conjunctions. These elements have the same level of importance and contribute equally to the meaning of the sentence. Think of it as creating a balanced structure where each part holds its own weight.

Subordination, on the other hand, involves combining clauses that are not equal. One clause, the main clause, expresses the primary idea, while the other clause, the subordinate or dependent clause, provides additional information, context, or modifies the main clause. The dependent clause relies on the main clause for its meaning and cannot stand alone as a complete sentence. Subordination creates a hierarchical structure, where one part is dominant and the other is secondary.

Structural Breakdown

To understand coordination and subordination, it’s essential to grasp the fundamental building blocks of sentences: clauses, conjunctions, and pronouns.

Independent Clauses

An independent clause is a group of words that contains a subject and a verb and expresses a complete thought. It can stand alone as a sentence. For example: “The sun is shining.” or “She is reading a book.”

Dependent Clauses

A dependent clause, also known as a subordinate clause, contains a subject and a verb but does not express a complete thought. It cannot stand alone as a sentence and relies on an independent clause for its meaning. Dependent clauses are introduced by subordinating conjunctions or relative pronouns. For example: “Because it was raining,” or “who lives next door.”

Coordinating Conjunctions

Coordinating conjunctions connect words, phrases, or independent clauses of equal grammatical rank. The most common coordinating conjunctions are often remembered by the acronym FANBOYS: For, And, Nor, But, Or, Yet, So.

Subordinating Conjunctions

Subordinating conjunctions introduce dependent clauses and connect them to independent clauses. They establish a relationship of time, cause, condition, contrast, or purpose between the clauses. Common subordinating conjunctions include: after, although, as, because, before, if, since, than, that, though, until, when, where, while.

Relative Pronouns

Relative pronouns introduce adjective clauses (also known as relative clauses) and connect them to the nouns or pronouns they modify. The most common relative pronouns are: who, whom, which, that, whose.

Types and Categories

Types of Coordination

Coordination primarily involves joining elements using coordinating conjunctions. The specific conjunction used determines the relationship between the coordinated elements.

Here’s a breakdown:

Addition: and (e.g., “I like coffee, and I like tea.”)
Contrast: but, yet (e.g., “I wanted to go to the park, but it was raining.”)
Choice: or, nor (e.g., “Would you like coffee, or would you prefer tea?”)
Reason/Result: for, so (e.g., “I was tired, so I went to bed.”)

Types of Subordination

Subordination involves using dependent clauses to add detail and complexity to sentences. There are three main types of dependent clauses:

Noun Clauses

A noun clause functions as a noun in a sentence. It can be a subject, object, complement, or appositive. Noun clauses are often introduced by words like that, what, who, whom, which, whoever, whomever, whichever, whether, if, how, when, where, why.

Adjective Clauses (Relative Clauses)

An adjective clause, also known as a relative clause, modifies a noun or pronoun in the main clause. It is usually introduced by a relative pronoun (who, whom, which, that, whose) or a relative adverb (when, where, why).

Adverb Clauses

An adverb clause modifies a verb, adjective, or adverb in the main clause. It provides information about time, place, reason, manner, condition, purpose, result, or concession. Adverb clauses are introduced by subordinating conjunctions such as after, although, as, because, before, if, since, than, though, until, when, where, while.

Examples

Coordination Examples

The following table provides various examples of coordination, showcasing how coordinating conjunctions link words, phrases, and independent clauses.

Coordinating Conjunction	Example Sentence
And	The cat sat on the mat, and the dog slept on the rug.
And	She likes to sing and dance.
And	He is both intelligent and hardworking.
But	I wanted to go to the beach, but it was too cold.
But	She is rich, but she is not happy.
But	The food was good, but the service was slow.
Or	Would you like tea, or would you prefer coffee?
Or	You can stay here, or you can leave.
Or	Is it Tuesday, or is it Wednesday?
Nor	He doesn’t like coffee, nor does he like tea.
Nor	She is not tall, nor is she short.
Nor	They didn’t call, nor did they write.
For	I went to bed early, for I was very tired.
For	He studied hard, for he wanted to pass the exam.
For	She brought an umbrella, for it was likely to rain.
Yet	It was raining, yet we decided to go for a walk.
Yet	He is old, yet he is very active.
Yet	She is tired, yet she continues to work.
So	I was hungry, so I made a sandwich.
So	He was late, so he missed the bus.
So	She studied hard, so she got a good grade.
And	The sky is blue, and the birds are singing.
And	I need to buy milk, eggs, and bread.
But	He is strong, but he is not invincible.
Or	Do you want to go now, or do you want to wait?
Nor	He didn’t study, nor did he even open the book.

Subordination Examples

The following sections provide examples of subordination, categorized by the type of dependent clause used.

Noun Clause Examples

Here are examples demonstrating how noun clauses function as subjects, objects, and complements within sentences.

Function	Example Sentence
Subject	What she said surprised everyone.
Subject	How he did it remains a mystery.
Subject	That he would come was unexpected.
Direct Object	I don’t know what he wants.
Direct Object	She understands why he left.
Direct Object	They believe that he is innocent.
Indirect Object	Give whoever needs it a copy.
Predicate Nominative	The problem is that we don’t have enough time.
Predicate Nominative	My belief is that everyone deserves a second chance.
Appositive	The rumor, that he was retiring, turned out to be false.
Appositive	His concern, that the project would fail, proved unfounded.
Subject Complement	The question is whether they will accept our offer.
Object Complement	They made what they believed a reality.
Object of Preposition	Pay attention to what the speaker says.
Object of Preposition	I am interested in how the experiment turns out.
Subject	Whether he will arrive on time is uncertain.
Direct Object	I heard that she won the competition.
Predicate Nominative	The truth is that he never intended to hurt anyone.
Appositive	The news, that the company was going bankrupt, shocked everyone.
Object of Preposition	She is worried about what others might think.
Subject	What you see is what you get.
Direct Object	Tell me what you think.
Predicate Nominative	Life is what you make it.

Adjective Clause Examples

The table below demonstrates how adjective clauses modify nouns and pronouns, adding descriptive detail to sentences. Note the use of relative pronouns.

Relative Pronoun	Example Sentence
Who	The man who lives next door is a doctor.
Who	She is the artist who painted this mural.
Whom	The person whom I saw yesterday is my friend.
Whom	He is the candidate whom the committee selected.
Which	The book which I borrowed from the library is very interesting.
Which	This is the car which I want to buy.
That	The movie that we watched last night was amazing.
That	The song that she sang became a hit.
Whose	The woman whose car was stolen is very upset.
Whose	He is the author whose book won the award.
Where	This is the house where I grew up.
When	I remember the day when we first met.
Who	The students who studied hard passed the exam.
Whom	The teacher whom everyone respects is retiring.
Which	The cake which she baked was delicious.
That	The idea that he proposed was brilliant.
Whose	The company whose products are innovative is thriving.
Who	The dog, who was barking loudly, woke up the neighbors.
Which	The painting, which was hanging in the gallery, was sold for a fortune.
That	The problem, that he ignored for so long, became unmanageable.
Who	She is the woman who teaches English at the local school.
Which	The bicycle, which I bought last year, is already broken.
That	The information that he provided was crucial to the investigation.

Adverb Clause Examples

Below are examples of adverb clauses, demonstrating how they modify verbs, adjectives, or adverbs, providing information about time, place, reason, and other circumstances.

Subordinating Conjunction	Type	Example Sentence
After	Time	After the rain stopped, we went for a walk.
Before	Time	Before you leave, please turn off the lights.
When	Time	When I finish my work, I will go to the gym.
While	Time	While I was cooking, he was watching TV.
Since	Time/Reason	Since he moved to a new city, he has been happier.
Because	Reason	Because it was cold, I wore a jacket.
As	Reason/Time	As it was getting late, we decided to go home.
If	Condition	If it rains, we will stay inside.
Unless	Condition	Unless you study hard, you won’t pass the exam.
Although	Concession	Although it was difficult, she finished the project.
Though	Concession	Though he was tired, he continued to work.
Even though	Concession	Even though it was expensive, I bought it.
Where	Place	Where there is smoke, there is fire.
Wherever	Place	Wherever you go, I will follow you.
So that	Purpose	He studied hard so that he could pass the exam.
In order that	Purpose	She exercised regularly in order that she would stay healthy.
As if/As though	Manner	He acted as if he knew everything.
Than	Comparison	She is taller than I am.
As…as	Comparison	He is not as smart as he thinks he is.
Until	Time	Wait here until I return.
As soon as	Time	Call me as soon as you arrive.
Now that	Reason	Now that the weather is nice, we can go outside.
Whenever	Time	Whenever I see him, I feel happy.
While	Contrast	While some people prefer coffee, others prefer tea.

Usage Rules

Coordination Rules

When coordinating independent clauses, it’s important to use a comma before the coordinating conjunction. However, if the clauses are short and closely related, the comma can be omitted.

For example, “The sun was shining and the birds were singing” (comma optional). When coordinating words or phrases, a comma is generally not needed unless the elements are part of a series of three or more.

Subordination Rules

When a dependent clause comes before the independent clause, a comma is usually required. For example, “Because it was raining, I took my umbrella.” If the dependent clause follows the independent clause, a comma is generally not needed unless the dependent clause adds nonessential information.

For example, “I took my umbrella because it was raining.” (no comma needed).

Punctuation in Complex Sentences

Punctuation is crucial for clarity in complex sentences. Use commas to separate dependent clauses from independent clauses when the dependent clause introduces the sentence.

Use semicolons to join closely related independent clauses, especially when no coordinating conjunction is used. Use colons to introduce lists or explanations that elaborate on the preceding independent clause.

Common Mistakes

One common mistake is using a comma splice, which occurs when two independent clauses are joined with only a comma. This can be corrected by adding a coordinating conjunction after the comma, using a semicolon, or making the clauses into separate sentences.

Another mistake is using a subordinating conjunction to join two independent clauses, creating a sentence fragment. Here are some examples:

Incorrect	Correct	Explanation
I went to the store, I bought milk.	I went to the store, and I bought milk.	Comma splice corrected with coordinating conjunction.
I went to the store; I bought milk.	I went to the store; I bought milk.	Comma splice corrected with a semicolon.
Because I went to the store. I bought milk.	Because I went to the store, I bought milk.	Fragment corrected by combining clauses.
Although it was raining, but I still went for a walk.	Although it was raining, I still went for a walk.	Redundant conjunction “but” removed.
She is a doctor who helps people which is a noble profession.	She is a doctor who helps people, which is a noble profession.	Corrected the use of ‘which’ to refer to the entire clause.
He likes to read, to swim, and to hike.	He likes to read, swim, and hike.	Unnecessary “to” removed for parallelism.
If I would have known, I would have told you.	If I had known, I would have told you.	Corrected the conditional tense.
The reason is because he was late.	The reason is that he was late.	Redundant “because” replaced with “that.”
Between you and I, this is a secret.	Between you and me, this is a secret.	Corrected the pronoun case.
Who are you going to invite?	Whom are you going to invite?	Corrected the pronoun case.

Practice Exercises

Exercise 1: Identify the clauses in the following sentences. Indicate whether each clause is independent or dependent.

Sentence	Clause 1	Clause 2
Because it was raining, I took my umbrella.	Because it was raining (Dependent)	I took my umbrella (Independent)
The sun was shining, and the birds were singing.	The sun was shining (Independent)	The birds were singing (Independent)
She is the artist who painted this mural.	She is the artist (Independent)	who painted this mural (Dependent)
I don’t know what he wants.	I don’t know (Independent)	what he wants (Dependent)
After the rain stopped, we went for a walk.	After the rain stopped (Dependent)	We went for a walk (Independent)
Although it was difficult, she finished the project.	Although it was difficult (Dependent)	She finished the project (Independent)
The man who lives next door is a doctor.	The man is a doctor (Independent)	who lives next door (Dependent)
Would you like tea, or would you prefer coffee?	Would you like tea (Independent)	would you prefer coffee (Independent)
I went to bed early, for I was very tired.	I went to bed early (Independent)	I was very tired (Independent)
She is rich, but she is not happy.	She is rich (Independent)	She is not happy (Independent)

Exercise 2: Combine the following sentences using coordination.

Sentences	Combined Sentence
I like coffee. I like tea.	I like coffee, and I like tea.
I wanted to go to the beach. It was too cold.	I wanted to go to the beach, but it was too cold.
Would you like tea? Would you prefer coffee?	Would you like tea, or would you prefer coffee?
He doesn’t like coffee. He doesn’t like tea.	He doesn’t like coffee, nor does he like tea.
I was hungry. I made a sandwich.	I was hungry, so I made a sandwich.
She is intelligent. She is hardworking.	She is intelligent and hardworking.
You can stay here. You can leave.	You can stay here, or you can leave.
It was raining. We decided to go for a walk.	It was raining, yet we decided to go for a walk.
He studied hard. He wanted to pass the exam.	He studied hard, for he wanted to pass the exam.
The sky is blue. The birds are singing.	The sky is blue, and the birds are singing.

Exercise 3: Combine the following sentences using subordination.

Sentences	Combined Sentence
It was raining. I took my umbrella.	Because it was raining, I took my umbrella.
The rain stopped. We went for a walk.	After the rain stopped, we went for a walk.
She is the artist. She painted this mural.	She is the artist who painted this mural.
I don’t know. He wants something.	I don’t know what he wants.
It was difficult. She finished the project.	Although it was difficult, she finished the project.
He moved to a new city. He has been happier.	Since he moved to a new city, he has been happier.
I finish my work. I will go to the gym.	When I finish my work, I will go to the gym.
You leave. Please turn off the lights.	Before you leave, please turn off the lights.
It rains. We will stay inside.	If it rains, we will stay inside.
You study hard. You won’t pass the exam.	Unless you study hard, you won’t pass the exam.

Advanced Topics

Sentence Variety

Mastering coordination and subordination allows for greater sentence variety in writing. Varying sentence structure keeps the reader engaged and prevents monotony.

Experiment with different combinations of coordination and subordination to create a more dynamic and interesting writing style. For instance, start sentences with dependent clauses, use coordinating conjunctions to link complex ideas, and combine short sentences into longer, more sophisticated ones.

Rhetorical Effect

The choice between coordination and subordination can have a significant rhetorical effect. Coordination emphasizes equality between ideas, while subordination emphasizes the relative importance of ideas.

Use coordination to create a sense of balance and harmony, and use subordination to highlight the most important information and provide context or explanation. Skilled writers use both techniques strategically to achieve their desired rhetorical effect.

FAQ

What is the difference between a coordinating conjunction and a subordinating conjunction?
A coordinating conjunction connects words, phrases, or independent clauses of equal grammatical rank (e.g., and, but, or). A subordinating conjunction introduces a dependent clause and connects it to an independent clause, creating a complex sentence (e.g., because, although, if).
Do I always need a comma before a coordinating conjunction?
Generally, yes, when joining two independent clauses. However, if the clauses are short and closely related, the comma can be omitted. When coordinating words or phrases, a comma is usually not needed unless there’s a series of three or more.
When should I use a semicolon instead of a comma and a coordinating conjunction?
Use a semicolon to join two closely related independent clauses when you want to emphasize the connection between them and avoid using a coordinating conjunction. This is particularly useful when the clauses are parallel in structure or share a common theme.
What is a comma splice, and how can I avoid it?
A comma splice occurs when two independent clauses are joined only by a comma. To avoid it, either add a coordinating conjunction after the comma (e.g., “I went to the store, and I bought milk”), use a semicolon (e.g., “I went to the store; I bought milk”), or separate the clauses into two sentences (e.g., “I went to the store. I bought milk.”).
What is the difference between “that” and “which” in adjective clauses?
“That” is used to introduce restrictive (essential) adjective clauses, which are necessary to identify the noun they modify. “Which” is used to introduce nonrestrictive (nonessential) adjective clauses, which provide additional information but are not crucial for identifying the noun. Nonrestrictive clauses are set off by commas.
Can a dependent clause come before or after an independent clause?
Yes, a dependent clause can come before or after an independent clause. When a dependent clause comes before the independent clause, a comma is usually required. When it follows, a comma is generally not needed unless the dependent clause adds nonessential information.
What are the different types of dependent clauses?
There are three main types of dependent clauses: noun clauses, adjective clauses (relative clauses), and adverb clauses. Each type functions differently within the sentence and adds different kinds of information.
How can I improve my sentence variety using coordination and subordination?
Experiment with different sentence structures. Start sentences with dependent clauses, use coordinating conjunctions to link complex ideas, and combine short sentences into longer, more sophisticated ones. Varying sentence length and structure will make your writing more engaging and dynamic.

Conclusion

Mastering coordination and subordination is essential for crafting clear, complex, and engaging sentences. By understanding the different types of clauses, conjunctions, and pronouns, and by practicing the rules of usage and punctuation, you can significantly improve your writing skills.

Remember to vary your sentence structure, use coordination and subordination strategically, and avoid common mistakes like comma splices. With practice, you’ll be able to express your ideas with greater precision and sophistication.