Phrases and Clauses: Definition, Types and Examples
A phrase is a group of related words that works as one part of a sentence but has no subject and finite verb of its own, for example in the morning or the tall boy. A clause is a group of words that has a subject and a finite verb, for example the bell rang or when the bell rang.
That is the whole difference: a clause has its own subject + verb, a phrase does not. In this lesson you will learn the kinds of phrases, the kinds of clauses, a simple method to tell them apart, and the mistakes students make with them. After reading, test yourself with the phrases and clauses worksheet.
Phrase vs Clause: the Difference
A phrase = a group of words without a subject + finite verb. It cannot be a sentence by itself.
A clause = a group of words with a subject + finite verb. Some clauses can be sentences by themselves; some cannot.
A finite verb is a verb that shows tense and agrees with its subject (rings, rang, is ringing, will ring). Forms such as to ring (infinitive), ringing and rung alone are non-finite, so a group of words built around them is a phrase, not a clause.
| Point | Phrase | Clause |
|---|---|---|
| Subject + finite verb | No | Yes |
| Can it be a full sentence? | Never | Only a main (independent) clause |
| Example | after the match | after the match ended |
| Example | to win the race | she wants to win the race |
| Works as | a noun, adjective, adverb or verb | a sentence or a part of a sentence |
Phrase: on the table (no verb at all)
Phrase: running down the road (running is not a finite verb)
Clause: the cat sat on the table (subject the cat + finite verb sat)
Clause: because the cat was hungry (subject + verb, but it cannot stand alone)
What Is a Phrase? Kinds of Phrases
A phrase has a head word and other words that go with it. We name phrases by the job they do or by the kind of head word. Five kinds are taught first.
1. Noun phrase
A noun phrase is built around a noun and does the work of a noun (subject, object or complement).
The old bridge over the river collapsed.
I bought a new blue school bag.
My brother is a very good cricketer.
2. Verb phrase
A verb phrase is a main verb together with its helping (auxiliary) verbs.
She has been waiting since morning.
You should have told me earlier.
The results will be announced tomorrow.
3. Adjective phrase
An adjective phrase describes a noun or pronoun. Its head is an adjective.
The soup is extremely hot.
She wore a dress full of tiny mirrors.
He is proud of his daughter.
4. Adverb phrase
An adverb phrase tells how, when, where or how often something happens. Its head is an adverb, or it is a group of words acting as an adverb.
He drives very carefully.
We met a few days ago.
The train arrives every morning at six.
5. Prepositional phrase
A prepositional phrase starts with a preposition and ends with a noun or pronoun (its object). It works as an adjective phrase (describing a noun) or an adverb phrase (describing a verb). See prepositions in English for more.
The girl with the red umbrella is my cousin. (adjective phrase, describes girl)
The match was cancelled because of the rain. (adverb phrase, tells why)
Please wait under that tree. (adverb phrase, tells where)
Other phrases built on non-finite verbs
Some phrases are built on verb forms that are not finite. School grammar usually names three.
| Phrase | Built on | Example |
|---|---|---|
| Infinitive phrase | to + verb | To reach the station on time is difficult. |
| Gerund phrase | verb + -ing used as a noun | Reading English newspapers improves vocabulary. |
| Participial phrase | verb + -ing or -ed used as an adjective | The man standing at the gate is our guard. |
These are covered in detail in gerunds, infinitives and participles.
What Is a Clause? Main and Subordinate Clauses
Every clause has a subject and a finite verb. Clauses are of two basic kinds.
A main clause (independent clause) makes complete sense and can stand alone as a sentence.
A subordinate clause (dependent clause) does not make complete sense alone; it depends on a main clause.
I stayed at home because it was raining.
Main clause: I stayed at home
Subordinate clause: because it was raining (it begins with the conjunction because, so it needs the main clause to finish the thought)
A sentence with one main clause is a simple sentence; with two main clauses joined by and, but, or, a compound sentence; with a main clause and a subordinate clause, a complex sentence. Read more in simple, compound and complex sentences.
Three Kinds of Subordinate Clause
A subordinate clause does the work of a noun, an adjective or an adverb. That gives three kinds.
| Kind | Job | Usually begins with | Example |
|---|---|---|---|
| Noun clause | Works as a noun (subject, object, complement) | that, what, whether, if, who, why, how | I know that she is honest. |
| Adjective (relative) clause | Describes a noun or pronoun | who, whom, whose, which, that, where | The boy who sits next to me is Arjun. |
| Adverb clause | Works as an adverb (time, reason, condition, contrast, place, purpose) | when, because, if, although, where, so that | Call me when you reach home. |
Noun clause
What he said surprised everyone. (subject)
Nobody knows where she has gone. (object)
The question is whether we can afford it. (complement)
A quick test: a noun clause can be replaced by something or it. Nobody knows something. Read more in noun clauses.
Adjective clause
The book that you lent me was interesting.
My uncle, who lives in Pune, is visiting us.
That is the school where my mother studied.
It comes straight after the noun it describes. Details are in relative clauses.
Adverb clause
We stayed indoors because it was raining. (reason)
Although he was tired, he finished the work. (contrast)
You will pass if you work hard. (condition)
Wash your hands before you eat. (time)
See adverbial clauses for each type.
How to Identify a Phrase or a Clause
- Look for a verb that shows tense (is, went, will come, has finished). If there is none, it is a phrase.
- Ask “who or what does it?” If the verb has its own subject in the group, it is a clause.
- Watch for -ing and to + verb. Walking home and to walk home are phrases. She was walking home is a clause.
- If it is a clause, test if it can stand alone. The train left can: main clause. When the train left cannot: subordinate clause.
- Find the starting word. Words such as because, when, if, although, who, which, that usually mark a subordinate clause.
| Group of words | What it is | Why |
|---|---|---|
| after the exam | Phrase (prepositional) | no subject + verb |
| after the exam ended | Subordinate clause | subject exam + verb ended, but needs a main clause |
| having finished his homework | Phrase (participial) | having finished is non-finite |
| he had finished his homework | Main clause | subject + finite verb, complete sense |
| to learn English | Phrase (infinitive) | to + verb |
| who wants to learn English | Subordinate clause | has the subject who and the verb wants |
Common Mistakes with Phrases and Clauses
Writing a subordinate clause as a full sentence
A subordinate clause on its own is a fragment. Join it to a main clause.
❌ Because the bus was late. I missed the class.
✅ Because the bus was late, I missed the class.
✅ I missed the class because the bus was late.
Treating a phrase as a clause
A student may call Running down the road a clause because it has a verb-looking word. It has no finite verb, so it is a phrase.
❌ The boy running down the road. (fragment: no finite verb)
✅ The boy was running down the road.
✅ The boy running down the road is my neighbour’s son.
Misplacing the commas
Put a comma after a subordinate clause that comes first: When it rains, the roads flood. You usually need no comma when the main clause comes first: The roads flood when it rains. See the comma rules.
Count the finite verbs. One finite verb means one clause. A sentence with three finite verbs has three clauses, even if one is hidden in a long phrase.
✍️ Quick Practice — Phrase or Clause?
- in the garden
- when the bell rang
- Meera sings
- to finish the project
- because it was raining
- the tall boy at the back
- who lives next door
- after the long journey
Answers: 1. Phrase (prepositional) | 2. Clause (subordinate) | 3. Clause (main) | 4. Phrase (infinitive) | 5. Clause (subordinate) | 6. Phrase (noun phrase) | 7. Clause (subordinate, adjective clause) | 8. Phrase (prepositional)
✍️ Quick Practice — Kind of Subordinate Clause
Name the kind of the clause in bold: noun, adjective or adverb clause.
- I know that she is honest.
- The book that you lent me was interesting.
- We stayed indoors because it was raining.
- What he said surprised everyone.
- Call me when you reach home.
- The girl who won the prize is my cousin.
Answers: 1. Noun clause (object of know) | 2. Adjective clause | 3. Adverb clause (reason) | 4. Noun clause (subject) | 5. Adverb clause (time) | 6. Adjective clause
For more questions, use the phrases practice test and the clauses practice test.
Summary
A phrase is a group of words with no subject + finite verb of its own; the main kinds are noun, verb, adjective, adverb and prepositional phrases, plus infinitive, gerund and participial phrases. A clause has a subject and a finite verb. A main clause can stand alone; a subordinate clause cannot and works as a noun, an adjective or an adverb.
Key takeaway: look for a finite verb with its own subject. No finite verb means a phrase; a finite verb with a subject means a clause. Then ask whether it can stand alone.