A phrase is a group of words that may have a partial subject or verb but not both, or it may have neither a subject nor a verb. Phrases never have a subject doing the action of a verb. A clause, however, is by definition a group of words that has a subject and a verb.
Phrases and clauses are groups of words that act as a unit and perform a single function within a sentence.
A sentence can have any number of clauses and phrases combined together. See the examples below:
Notice how each of the clauses has a subject and a verb, but the phrases do not. Some of the clauses contain phrases, like “She laughs at shy people.” “She laughs” is a clause, and “at shy people” is a phrase that complements the clause and completes the sentence.
Phrases can be any combination of words that do not combine a subject and a verb. There are many types of phrases, including:
noun phrases (the nice neighbor, my best friend, troops of soldiers),
verbal phrases (waiting for the rain to stop, have been sleeping), and
prepositional phrases, which follow a preposition (after the storm, to the end of time, in the road).
You might be tempted to just assume that phrases are shorter than clauses. This is not always true. Many phrases are only two words long, but many are much longer. Look at the following sentence:
In 1833, Faraday’s experimentation with electrolysis indicated a natural unit of electrical charge, thus pointing to a discrete rather than continuous charge.
Each of the bolded segments of this sentence is a phrase. Be sure when you analyze each sentence that you are looking for a subject and a verb to decipher what is a clause and what is just a phrase.
Click through this interactive to learn more about the differences between clauses and phrases.
There are two types of clauses: dependent and independent.
A dependent clause has both a subject and a verb, but is not a complete sentence and does not express a complete thought. It is dependent on something else; it cannot stand on its own.
You can see that each of these clauses has a noun and a verb, but they also have an additional word, like a subordinating conjunction (because) or a relative pronoun (which), which makes the clause feel incomplete. These clauses must be attached to an independent clause to be a part of a complete sentence.
Some examples of dependent clauses include:
When we get enough snow
Because I was upset
Which book I want to read next
Until the sun sets
An independent clause, on the other hand, is free to stand by itself. It contains a subject and a verb, and expresses a complete thought that does not require anything else.
Here are some examples of independent clauses:
I enjoy sitting by the fireplace.
The sun set.
This is the book I want to read next.
So how can you tell if a clause is dependent or independent? Sometimes, they can be almost exactly the same. For example, “I was a little girl in 1995” is an independent clause, but “Because I was a little girl in 1995” is a dependent clause.
Look for the common words that are known to make dependent clauses, like subordinating conjunctions and relative pronouns. Some common ones are: after, although, as, as if, because, before, even if, even though, if, in order to, since, though, unless, until, whatever, when, whenever, whether, and while. Also, pay attention to whether the clause makes sense standing by itself. Do you understand the whole idea of what the sentence is saying? Does the thought seem incomplete? If it feels incomplete, it is probably a dependent clause.
Watch this video to learn more about dependent and independent clauses.
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Phrases and Clauses Interactive. Authored by: Excelsior OWL. Located at: https://owl.excelsior.edu/esl-wow/editing-polishing/check-punctuation/esl-basic-sentence-structure/. License: CC BY: Attribution
Text: Parts of a Sentence. Provided by: Lumen Learning. License: CC BY: Attribution
Phrases and Clauses Additional Content. Authored by: Alyse Leininger for Lumen Learning. License: CC BY: Attribution
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Dependent and Independent Clauses. Authored by: Khan Academy. Located at: https://www.khanacademy.org/humanities/grammar/syntax-sentences-and-clauses/phrases-and-clauses/v/dependent-and-independent-clauses-syntax-khan-academy. License: CC BY: Attribution. License Terms: Standard YouTube License
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Adapted from "Phrases and Clauses" by Lumen Learning, which is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).