Understanding independent clauses is important for structuring sentences correctly. But what is an independent clause?
No, it’s not Santa Claus’s rebellious child. Independent clauses are the main part of a sentence. Let’s dive into exactly what an independent clause is, how to spot one, and how to write one.
What’s an Independent Clause in a Sentence?
An independent clause is also called the main clause. It expresses a complete thought, and it can stand alone as a sentence. Its counterpart is a dependent clause, which cannot stand alone. Dependent and independent clauses can combine to make different types of sentences.
What Is a Clause in a Sentence?
With all this talk of independent and dependent clauses, you might be wondering what exactly a clause is. A clause is a phrase that contains a subject and a verb or verb phrase.
These subject and verbs must be related. Typically, this means that the subject is doing the verb in that clause, although the verb might not be an action verb (for example, is isn't an action verb). The verb might also be negated (e.g. "not" → not going).
A clause is a type of phrase, or group of words, but phrases do not have to be clauses. If there is a subject, stated or implied, related to a verb, then the phrase is a clause.
What does this look like?
- Not a clause: to the store
- Not a clause: went to the store
- Independent clause: he went to the store
- Dependent clause: when he went to the store
The first phrase is not a clause. There is no subject or verb. The second phrase is also not a clause because there is a verb but no subject.
In the third and fourth phrases, the subject is "he" and the verb is "went." The third phrase is an independent clause. We could capitalize the first word and put a period on the end, and it would be a complete sentence. The fourth phrase is a dependent clause because it does not express a complete thought.
We’ll look at the differences between dependent and independent clauses in the next section. Here's a quick video to help you review what you've learned so far:
What Is the Difference Between an Independent Clause and a Sentence?
When we say that an independent clause can stand on its own as a sentence, we mean that it expresses one entire thought. Dependent clauses represent incomplete thoughts.
Imagine you’re talking to your grandmother. She’s telling you a story about something from her childhood, but she keeps trailing off. She says, "When I met Elvis Presley," and then she just stops. Grandma! You can’t just start a story like that and not finish it! What happened when you met Elvis?
That’s a dependent clause. It’s an incomplete thought. If Grandma said, "I met Elvis Presley," that is a complete thought, although hopefully she continues the story! That’s an independent clause. She could leave the story there, and you will know this new fact about her. You might want to know more, but her statement isn’t missing anything.
Independent clauses express one complete thought. There is only one type of independent clause. However, there are three main types of dependent clauses.
A dependent clause can function in several different ways. It can function as a noun, an adjective, or an adverb. These are called nominal, adjectival, and adverbial dependent clauses, respectively.
Independent clauses can be sentences, or they can be one part of a sentence. It depends on the type of sentence, which we’ll cover in the next section.
How Do You Identify the Independent and Dependent Clauses in a Sentence?
Every complete sentence has an independent clause, but not every sentence contains a dependent clause. The number of independent and dependent clauses in a sentence tells you what type of sentence it is.
- A simple sentence contains just one independent clause and no dependent clauses.
- A compound sentence contains two or more independent clauses but no dependent clauses.
- A complex sentence contains one independent clause and at least one dependent clause.
- A compound-complex sentence contains at least two independent clauses and at least one dependent clause.
To determine whether a clause is dependent or independent, you must ask yourself if it can stand alone as a sentence. Does it sound complete when you read it out loud?
Let’s look at some example sentences. Can you identify the dependent and independent clauses in each?
- Santa Claus was coming to town.
- Before Santa arrived, we had a big holiday party.
- The adults drank hot cocoa, and the kids played in the snow.
- After the party was over, we all went home, and the children went to bed.
The first example expresses only one complete thought. It’s a simple sentence. The second example has a dependent clause (before Santa arrived) and an independent clause (we had a big holiday party).
The third example contains two independent clauses. "The adults drank hot cocoa" and "the kids played in the snow" are both complete thoughts. This makes it a compound sentence
Finally, the last sentence contains one dependent clause (after the party was over) and two independent clauses (we all went home/the children went to bed). It’s a compound-complex sentence.
Using a dependent clause as a sentence creates a sentence fragment—an incomplete sentence that isn't grammatically correct. If you're writing an academic essay, a report, or any formal communication, you should avoid using sentence fragments.
Sentence fragments appear in fiction writing for effect, but if you use them too often it will become distracting. ProWritingAid's Realtime Report will highlight any sentence fragments in your writing and remind you to add a subject or verb. And if you want to use the fragment? Just hit ignore.
What Are the Parts of an Independent Clause?
Now that you know what an independent clause is and how to identify it, we can go one step further into understanding this important grammar feature. What are the components that make up an independent clause?
An independent clause is comprised of a subject and a predicate. The subject is the "who" or "what" of a clause. It is the noun or noun phrase that is doing the verb. A simple subject contains just the noun or pronoun with no additional modifiers.
A predicate is the part of a clause that contains the verb or verb phrase. It’s the action or state of being of a clause. The predicate doesn't have to contain an action—it can also include "be verbs" (like is, was, was not, etc). A simple predicate is just the verb or verb phrase and none of the additional modifying words.
We wrote a whole article on subjects and predicates to help you understand what they are and how to use them.
Here’s what this looks like in an independent clause:
The big, yellow cat purred happily.
The subject is "the big, yellow cat."
- The simple subject is "cat."
- The predicate is "purred happily."
- The simple predicate is "purred."
We know that the example is an independent clause because it contains a subject and a predicate and expresses a complete thought.
How Do I Join an Independent Clause to Another Clause?
Since we don’t write exclusively in simple sentences, it’s important to know how to connect independent clauses to other clauses. We connect independent clauses differently, depending on what type of clause it’s connected to.
How Do I Connect Two Independent Clauses?
We can connect two independent clauses in a few different ways. The first method is to use a coordinating conjunction.
There are seven coordinating conjunctions in English: for, and, nor, but, or, yet, so. You can remember these with the acronym FANBOYS.
Note that "so" can be either a coordinating conjunction or a subordinating conjunction. We’ll cover those in the next section.
When you combine two independent clauses with a coordinating conjunction, you must place a comma before the conjunction. Here’s an example:
- I love green curry, but my mom hates it.
We place the comma directly after the first independent clause and before the coordinating conjunction. There is no comma after the conjunction.
You don’t have to use a coordinating conjunction to connect independent clauses. You can also use certain punctuation marks. These are semicolons, em dashes, and colons.
When you use a semicolon, you do not include a coordinating conjunction. You can use a transitional word or phrase after the semicolon, like "however" or "as a result." These are called independent markers.
Here is what using a semicolon to join independent clauses looks like:
- My son is smart; he makes straight As.
- The dog ate chocolate; consequently, we spent a fortune at the vet.
- We discovered the thief—it was my next-door neighbor!
You don’t usually see colons separating independent clauses. The independent clauses must be closely related to use a colon. The emphasis should also be on the second clause.
- The results of the study surprised us: the animals responded positively to the visual stimuli.
Notice that no matter whether we use a semicolon, colon, or em dash to connect two independent clauses, we do not use a coordinating conjunction.
What’s a Comma Splice?
A comma splice is when you connect two independent clauses with only a comma. It is grammatically incorrect. To fix a comma splice, you can:
- add a coordinating conjunction after the comma,
- replace the comma with a semicolon (or em dash or colon, as appropriate), or
- add a subordinating conjunction to create one dependent clause.
Here’s what this looks like:
- INCORRECT: I loved the book, I am excited for the movie.
- CORRECT: I loved the book, so I am excited for the movie.
- CORRECT: I loved the book; I am excited for the movie.
- CORRECT: Because I loved the book, I am excited for the movie.
If you still get confused on how to connect independent clauses, ProWritingAid can help. The editing tool will point out punctuation errors like comma splices so you can feel confident about your grammar.
How Do I Connect an Independent Clause to a Dependent Clause?
A dependent clause is also called a subordinate clause. We use subordinating conjunctions to connect dependent clauses to independent clauses.
Subordinating conjunctions include words like:
- in order to
- now that
When a dependent clause precedes an independent clause, place a comma after the dependent clause, like in the example below.
- Because I graduated high school early, everyone in my college classes was older than me.
When dependent clauses follow independent clauses, we usually do not use a comma before the subordinating conjunction. Here’s the same example flipped around:
- Everyone in my college classes was older than me because I graduated high school early.
However, you can place a comma before a subordinating conjunction when the conjunction is an adverb of concession.
An adverbial dependent clause that concedes a point made in the independent clause uses an adverb of concession such as although, even though, though, even if, whereas, while.
If you aren’t sure if the conjunction is an adverb of concession, ask yourself if the dependent clause contradicts the main idea in some way.
Here are a few examples of adverbs of concession that follow independent clauses.
- I loved him, even though he made me mad.
- Don’t call her, even if it’s an emergency.
- My friends love to read, whereas I prefer to watch TV.
In general, however, you can remember that a comma comes after a dependent clause but not before one.
What Are Some Examples of Independent Clauses?
Let’s make sure we really understand independent clauses with a few more examples. We’ve underlined the independent clauses.
- I love sushi.
- Whenever he calls, she sends him to voicemail.
- She runs a 10K every Thanksgiving, even though her family hates running.
- I went to the store for bread, but they had run out.
- The doctor will call you if your test results are abnormal.
- Because my teacher believed in me, I graduated high school, and I received a full scholarship to a university.
We hope you feel confident about identifying and using independent clauses after this article. Do you struggle with constructing sentences and punctuating clauses? Let us know in the comments.