Because these clauses contain all the necessary components to function independently, they are the "anchors" of your writing. You can string them together using conjunctions, but on their own, they are perfectly valid sentences.
Dependent Clauses: The Need for Connection
Unlike their independent counterparts, dependent clauses (also known as subordinate clauses) cannot stand alone. While they contain a subject and a verb, they begin with words that create a sense of incompleteness. These words are often called "subordinating conjunctions" (such as because, although, if, since, or while).
If you were to walk up to someone and say, "Because it was raining," and then stop talking, they would be waiting for you to finish your thought. That "waiting" feeling is the hallmark of a dependent clause.
To turn a dependent clause into a complete thought, you must attach it to an independent clause.
Example Transformation:
- Dependent Clause: Because it was raining... (Incomplete)
- Independent Clause: We stayed inside. (Complete)
- Combined Sentence: Because it was raining, we stayed inside. (Complete)
Sentence Structures: Putting It All Together
Once you understand these two types of clauses, you can begin to build the four primary types of sentence structures used in English.
1. Simple Sentences
A simple sentence consists of exactly one independent clause. It may have a compound subject or a compound verb, but it remains a single functional unit.
- Example: "The cat slept on the rug."
2. Compound Sentences
A compound sentence joins two or more independent clauses together. This is usually done using a comma and a coordinating conjunction (the "FANBOYS": for, and, nor, but, or, yet, so) or a semicolon.
- Example: "The cat slept on the rug, and the dog barked at the mailman."
3. Complex Sentences
A complex sentence combines one independent clause with at least one dependent clause. This structure is excellent for showing relationships like cause and effect or time.
- Example: "Although the cat was tired, it stayed awake to watch the birds."
4. Compound-Complex Sentences
As the name suggests, this is the most advanced structure. It contains at least two independent clauses and at least one dependent clause.
- Example: "Because the weather was beautiful, we went to the park, and we stayed until sunset."
Common Pitfalls to Avoid
When playing with these structures, students often fall into two common traps: Sentence Fragments and Run-on Sentences.
The Sentence Fragment
A fragment occurs when you treat a dependent clause as if it were an independent one.
- Incorrect: "Since I forgot my umbrella."
- Correct: "Since I forgot my umbrella, I got soaked."
The Run-on Sentence
A run-on occurs when you smash two independent clauses together without the proper punctuation or conjunctions.
- Incorrect: "The sun is bright it is hot outside."
- Correct: "The sun is bright, and it is hot outside." (or) "The sun is bright; it is hot outside."
Summary Checklist:
- Does my sentence have a subject and a verb?
- If it starts with a word like if, because, or when, does it have an independent clause to lean on?
- If I have two complete thoughts, did I use a comma + conjunction or a semicolon to join them?
By mastering the balance between independent and dependent clauses, you gain control over the rhythm and clarity of your writing, allowing you to guide your reader through complex ideas with ease.
