Phrases and Clauses | English Grammar Chapter 21

Learning objectives

By the end of this lesson, you should be able to explain the rules, recognise the target forms in context, avoid common errors and apply the patterns to new sentences.

Understand the core terms and distinctions.
Study examples in complete sentences, not as isolated rules.
Complete all 15 practice items before opening the answer key.

1. Phrase or clause?

A phrase is a group of words functioning as a unit but not normally containing its own finite subject–verb combination. A clause contains a subject and a predicate; it may be independent or dependent.

Phrase: under the old bridge. Clause: the bridge collapsed.

2. Independent and dependent clauses

An independent clause can stand as a sentence. A dependent clause needs a main clause to complete the intended structure. Avoid sentence fragments and comma splices.

Independent: We left early. Dependent: because the road was flooded.

3. Noun clauses

A noun clause can function as a subject, object or complement. Common introductions include that, whether, if and wh-words.

What she decided surprised us. / I know that he is honest.

4. Adjective and adverb clauses

An adjective (relative) clause describes a noun; an adverb clause modifies a verb, adjective or clause and can express time, reason, condition, contrast or purpose.

The book that you lent me is useful. / I waited until the rain stopped.

5. Punctuation and common errors

A dependent clause at the beginning is usually followed by a comma. A restrictive relative clause normally has no commas; a non-restrictive one is set off by commas. Do not leave a dependent clause as a fragment.

Although it was late, we continued. / My brother, who lives in Dhaka, is visiting.

Guided practice

Try each item first. Then open the answer key and read the explanation for any answer you missed.

In “The boy in the red shirt smiled,” which words form a phrase?
Which is a clause? (a) after lunch (b) when she arrived
Identify the independent clause: “When the bell rang, the students left.”
Identify the noun clause: “I believe that she is right.”
Complete: ___ he said was surprising. (What / Which)
Identify the adjective clause: “The house that Jack built is old.”
Identify the adverb clause: “We stayed inside because it was raining.”
Correct the fragment: “Although the team played well.”
Choose the correct punctuation: “If you need help ___ call me.”
Choose: My aunt, ___ lives in Sylhet, is a doctor. (who / that)
Is “because the train was late” independent or dependent?
Identify the noun clause: “Whether we win depends on teamwork.”
Correct the comma splice: “I was tired, I went to bed.”
Which clause shows condition? “Unless you hurry, you will miss the bus.”
What does the relative clause modify in “The student who won smiled”?

Show answer key and explanations

in the red shirt — It has no finite verb and describes the boy.
when she arrived — The clause has a subject (she) and a verb (arrived).
the students left — It can stand alone as a complete sentence.
that she is right — The clause functions as the object of believe.
What — What he said is a noun clause functioning as the subject.
that Jack built — It describes the noun house.
because it was raining — It gives the reason for staying inside.
Although the team played well, it lost. (or another complete main clause) — Although introduces a dependent clause that needs a main clause.
If you need help, call me. — A fronted dependent clause is normally followed by a comma.
who — A non-restrictive clause set off by commas normally uses who, not that.
Dependent — Because introduces a reason clause that cannot normally stand alone.
Whether we win — The clause is the subject of depends.
I was tired, so I went to bed. (or I was tired; I went to bed.) — Two independent clauses need an appropriate join, not a comma alone.
Unless you hurry — Unless introduces a condition meaning if not.
the student — The clause who won identifies/describes the student.

Revision checklist

I can explain the main rules in my own words.
I can recognise the correct form in a complete sentence.
I can explain why a common incorrect form is wrong.
I can apply the rule to a new example.

If an answer was wrong, identify the rule behind the mistake and try writing two original examples.

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Editorial note: Some grammar conventions vary by dialect or examination syllabus. Follow the terminology and conventions specified by your course or exam board where relevant.