The Parts of Speech System

Lesson 7: Conjunctions — Joining Words and Ideas

Lesson: 7 of 9      Level: 🔵 Beginner

1. Lesson Overview

Language would be very limited if every sentence could only express one idea. Conjunctions are the words that allow us to connect ideas, combine sentences, show contrasts, express causes, and build the complex, flowing prose that characterises skilled writing and speech.

A sentence like The Amazon River is vast. The Amazon River is difficult to navigate. becomes far more elegant and informative when joined: The Amazon River is vast but difficult to navigate. That single word but does the connecting work — and that is precisely what a conjunction does.

This lesson introduces the three main types of conjunctions in English — coordinating, subordinating, and correlative — and equips you with the rules needed to use them accurately and effectively.

Objectives

By the end of this lesson, you will be able to:

• Define a conjunction and explain its connecting function
• Distinguish between coordinating, subordinating, and correlative conjunctions
• Understand how conjunctions affect sentence structure and meaning
• Recognise and correct common errors in conjunction usage

2. Core Content

A. Defining a Conjunction

A conjunction is a word that connects words, phrases, or clauses within a sentence. Conjunctions establish the logical relationship between the elements they join — whether that relationship is one of addition, contrast, cause, condition, time, or purpose.

Consider the following sentences:

The Sahara is the largest hot desert on Earth, but it was once a fertile grassland. Although the Amazon basin receives heavy rainfall throughout the year, some areas experience distinct dry seasons.

In the first sentence, but connects two independent clauses and signals a contrast. In the second, although introduces a dependent clause that qualifies the information in the main clause. Both words are conjunctions, but they work differently — and that difference is the key to understanding the conjunction system in English.

B. Coordinating Conjunctions

A coordinating conjunction joins two grammatically equal elements — two words, two phrases, or two independent clauses. There are seven coordinating conjunctions in English, often remembered by the acronym FANBOYS.

For example:

The Nile flows northward through eleven countries and empties into the Mediterranean Sea. Scientists have studied the Great Barrier Reef for decades, yet many of its species remain undescribed.

In the first sentence, and joins two verb phrases describing what the Nile does. In the second, yet joins two independent clauses and signals a contrast — decades of study have not led to complete knowledge.

When a coordinating conjunction joins two independent clauses, a comma is placed before the conjunction. When it joins two words or phrases, no comma is needed.

C. Subordinating Conjunctions

A subordinating conjunction introduces a dependent clause and connects it to a main clause. The dependent clause cannot stand alone as a sentence; it depends on the main clause for its full meaning.

Subordinating conjunctions are grouped by the kind of relationship they express.

For example:

Although the surface of Mars is barren and cold, evidence suggests that liquid water once flowed there. When tectonic plates collide, enormous mountain ranges such as the Himalayas are formed over millions of years.

In the first sentence, although introduces a contrast between the current state of Mars and its past. In the second, when introduces the condition under which mountain formation occurs. In both cases, the dependent clause introduced by the conjunction cannot stand alone.

When the dependent clause comes first in a sentence, it is followed by a comma. When the main clause comes first, no comma is needed.

D. Correlative Conjunctions

Correlative conjunctions work in pairs to join grammatically equal elements. They must always be used together and the elements they connect must be parallel in structure.

For example:

Not only is the deep ocean largely unexplored, but it also contains resources that may be of enormous scientific value. Neither the government nor the international community has yet agreed on a binding solution to the problem of ocean plastic pollution.

In the first sentence, not only…but also adds emphasis and draws attention to two related facts. In the second, neither…nor joins two subjects in a negative construction — and because both subjects are singular, the verb remains singular.

E. Conjunctive Adverbs

Although not strictly conjunctions, conjunctive adverbs perform a similar connecting function between independent clauses. They are worth introducing here because learners frequently confuse them with coordinating conjunctions.

Common conjunctive adverbs include however, therefore, furthermore, nevertheless, consequently, moreover, meanwhile, otherwise, and indeed.

Unlike coordinating conjunctions, conjunctive adverbs are preceded by a semicolon — not a comma — when they join two independent clauses, and are followed by a comma.

For example:

The surface temperature of Venus reaches 465°C; consequently, no spacecraft has survived on its surface for more than a few hours. Deforestation is accelerating across several regions of the world; however, some countries have made significant progress in reforestation.

In the first sentence, consequently shows that the extreme temperature is the cause of the spacecraft’s failure to survive. In the second, however signals a contrast between a negative global trend and positive local progress.

3. Usage in Context

4. Common Errors and Corrections

5., Lesson Mastery

After completing this lesson, you should now be able to:

✅ Define a conjunction and explain its connecting function

✅ Distinguish between coordinating, subordinating, and correlative conjunctions

✅ Understand how conjunctions affect sentence structure and meaning

✅ Recognise and correct common errors in conjunction usage