Every sentence is built from clauses.
A clause is a group of words with its own subject and verb. Some clauses stand alone as complete sentences; others depend on a partner to make sense. Learn to tell them apart, then watch them work together.
Four clauses, two families
One clause can stand alone. Three others depend on it. Open each card to see how to spot them and what job each one does.
It always has its own subject and predicate.
Join two independent clauses with a comma and a conjunction, or a semicolon — both sides are still independent.
She sings beautifully.
The sun set.
She stayed home, because she was sick. (the first clause could stand alone)
It usually starts with a relative pronoun: who, whom, whose, which, or that.
Remove it and the sentence still stands — it only adds description.
The book that I borrowed was fascinating.
The girl who won the contest is my friend.
I met a woman who is a famous writer.
It answers when?, why?, or under what condition? about the main clause.
It starts with a subordinating conjunction: because, although, if, when, while.
When the bell rings, we will go to lunch.
She stayed home because she was sick.
Although it was raining, they went for a walk.
Try replacing it with “something” or “it” — if the sentence still works, it’s a noun clause.
It fills a noun’s job — subject, object, or complement — not a describing job.
What he said was surprising. (subject)
She didn’t know that he had left. (object)
The question is whether we should go. (complement)
| Clause | Its job | Common examples |
|---|---|---|
| Independent | Stands alone as a complete sentence | She sings beautifully, The sun set |
| Adjective | Describes a noun or pronoun | who, whom, whose, which, that |
| Adverbial | Adds time, reason, condition, or contrast | because, although, if, when, while |
| Noun | Acts as a subject, object, or complement | that, if, whether, what, who |
Clauses at work
Ten quick questions — decide whether each underlined clause is independent, adjective, adverbial, or noun. You get instant scoring and a short explanation for every answer.
One clause can stand alone. Three others lean on it.
Every clause has a subject and a verb, but only an independent clause can stand by itself as a full sentence. Adjective, adverbial, and noun clauses all depend on that independent clause to make sense — each filling a different job: describing, explaining, or naming. Spot the independent clause first, and every sentence falls into place.