Coordinating & Subordinating Conjunctions: Fifth Grade English Student Guide

Conjunctions serve as the structural mortar of English syntax, connecting individual words, balancing equal phrases, and binding dependent thoughts to independent clauses.

Coordinating Conjunctions: Balancing Equal Elements

Coordinating conjunctions connect words, phrases, or independent clauses that possess equal grammatical importance. The seven coordinating conjunctions in English are easily remembered using the famous acronym FANBOYS.

+--------------------------------------------------------------+
|                   THE FANBOYS CONJUNCTIONS                   |
+---+---------+------------------------------------------------+
| F | For     | Explains reason or cause (similar to because)  |
| A | And     | Adds similar or supplementary information      |
| N | Nor     | Connects two negative alternatives             |
| B | But     | Shows contrast or exception                    |
| O | Or      | Presents choices or possibilities              |
| Y | Yet     | Presents surprising contrast (similar to but)  |
| S | So      | Shows result, consequence, or effect           |
+---+---------+------------------------------------------------+

Punctuating Compound Sentences with FANBOYS

When a coordinating conjunction connects two complete independent clauses (each having its own subject and verb), you MUST place a comma immediately before the coordinating conjunction: "The rain poured for three days, but the earthen dam held firm." If you omit the comma, you create a run-on sentence. If you omit the conjunction, you create a comma splice.

Subordinating Conjunctions: Establishing Hierarchy

A subordinating conjunction connects an independent clause to a dependent clause, establishing a relationship of cause, condition, time, comparison, or concession. Unlike coordinating conjunctions that balance equals, a subordinating conjunction makes one idea subordinate to another.

+--------------------------------------------------------------+
|               COMMON SUBORDINATING CONJUNCTIONS              |
+-------------------+------------------------------------------+
| TIME              | after, before, since, until, when, while |
+-------------------+------------------------------------------+
| CAUSE & REASON    | because, since, as, so that              |
+-------------------+------------------------------------------+
| CONDITION         | if, unless, provided that, even if       |
+-------------------+------------------------------------------+
| CONTRAST / CONCESS| although, even though, while, whereas    |
+-------------------+------------------------------------------+

The Comma Rule for Dependent Clauses

When a complex sentence begins with a dependent clause introduced by a subordinating conjunction, place a comma after the dependent clause: "Although the summit was shrouded in mist, the mountaineers pressed upward." However, when the independent clause comes first, no comma is generally needed: "The mountaineers pressed upward although the summit was shrouded in mist."

Exercises and Solutions

Exercise 1: Coordinating vs. Subordinating Identification. Identify the conjunction in each of the following sentences and state whether it is coordinating or subordinating: Sentence A: "The lunar rover stopped transmitting data, so engineers recalibrated the receiver." Sentence B: "Unless the barometric pressure rises soon, the fishing vessels must remain in port."

Solution 1: In Sentence A, the conjunction is "so," which is a coordinating conjunction connecting two independent clauses with equal grammatical standing. In Sentence B, the conjunction is "Unless," which is a subordinating conjunction introducing a conditional dependent clause.

Exercise 2: Sentence Combining and Punctuation. Combine these two simple sentences into a complex sentence using the subordinating conjunction "because": "The fragile desert ecosystem suffered extensive erosion. Off-road vehicles trampled the root systems of native shrubs." Write the sentence twice: first with the dependent clause at the beginning, and second with the dependent clause at the end. Be sure your comma usage is accurate in both versions.

Solution 2: With the dependent clause at the beginning: "Because off-road vehicles trampled the root systems of native shrubs, the fragile desert ecosystem suffered extensive erosion." (Requires a comma). With the dependent clause at the end: "The fragile desert ecosystem suffered extensive erosion because off-road vehicles trampled the root systems of native shrubs." (Requires no comma).