Clauses are groups of words with a subject and a verb.
Wow. That was short. You won't have a hard time memorizing that definition! You should memorize it, by the way.
There are two main types: independent and dependent.
These can stand alone because they express complete thoughts.
The sun rises in the east.
Warm brownies taste delicious!
I drink coffee.

These can't stand alone because they don't express complete thoughts.
since I drink coffee
whenever the sun rises
because I love stories
Do you want to know the super cool thing about these? They act as one part of speech! Isn't that crazy?
All of the words come together to act as an adjective, adverb, or noun.
We can divide these into categories based on what part of speech they function as. When we do this, we get three categories.
The three types of subordinate clauses are adjective, adverb, and noun.
Click on the links below to get in-depth lessons on each one!
These function as adjectives.
That means that they modify nouns or pronouns. Read more about these.
They are often introduced by special words called relative pronouns (who, whose, whom, that, which), but they can also be introduced by relative adverbs (where, when, why).

The woman who looked happy danced.
Who looked happy is modifying woman.
This is how we would diagram that sentence. Notice that the diagram shows the adjective clause connected to woman, the noun it is modifying.
The diagram really SHOWS that these function as adjectives. Isn't that neat?
These function as adverbs.
That means that they modify verbs, adjectives, or other adverbs. Read more about these.
These are introduced by subordinating conjunctions (after, before, if, since, until...).

I read because I love stories.
Because I love stories is modifying read.
This is how we would diagram that sentence. Notice that the diagram shows the adverb clause connected to read, the verb it is modifying.
Once again, sentence diagramming makes the relationship between the words visual. (Can you tell that I like sentence diagramming?)
You might want to check out elliptical clauses as well. They are subordinate and they act as adverbs, but some of their words are implied. You can read more about them here.
Are you surprised to discover that these act as nouns? You probably already used your powerful brain to figure that out. Read more about these.
These can do anything that nouns can do.
That means that they can be subjects, direct objects, objects of prepositions, indirect objects, and more.
Sometimes these are introduced by words called noun clause markers, and sometimes they have no word introducing them at all!

My mother knows I love the library.
I love the library is the direct object of the verb knows.
If you know how to diagram sentences, you can see in the sentence diagram that I love the library is sitting in the spot where the direct object goes.
If you don't know how to diagram sentences, you'll just have to take my word for it until you learn how to diagram for yourself!
|
If you want to teach or learn grammar the easy way, then follow a step-by-step program that clearly lays everything out for you and allows you to move at your own pace. The Get Smart program is presented in a meaningful sequence, so it's not an overwhelming mishmash of information. Before you know it, you'll be a grammar and sentence diagramming pro! |
![]() Elizabeth O'Brien is the creator of the Grammar Revolution step-by-step grammar and sentence diagramming programs. Her programs are guaranteed not only to teach you grammar, but also to give you more confidence in your communication skills. |
To get your free Parts of Speech guide and receive Elizabeth's bi-weekly articles on improving your grammar and having fun with sentence diagramming, enter your email address and name below right now. |
![]() |
![]() |
![]() |
![]() |

Beginner Level
Beginner's Deluxe Program
Teach yourself or your students grammar and sentence diagramming in ten minutes a day! Start immediately.
Beginner's Basic Program
Learn how to diagram sentences.
All Levels
The Perfect Supplement
Look up topics, learn about them, and see how they are diagrammed.
Advanced Level

Advanced Program ANSWER KEY
Keep your grammar and diagramming skills sharp!

Advanced Program WORKBOOK
Keep your grammar and diagramming skills sharp!