Micro-listening
Adjective clauses: identify the noun
How do adjective clauses work?
Adjective clauses describe a noun, usually the noun immediately before who, which, that, whose, where, or when. Use no commas when the clause identifies which noun you mean; use commas for extra information, with which rather than that. Example: The nurse who checked my temperature smiled warmly.
Key points
- Find the noun immediately before the relative pronoun.
- Use who for people and which for things.
- Use whose to show possession or connection.
- Defining clauses do not use commas.
This lesson has 5 stages. You can stop at any time and continue later.
At a glance
| Form | Use it for | Example |
|---|---|---|
| who | Describes people in relative clauses. | The chef who trained me works nearby. |
| which or that | Describes things in defining clauses. | The phone that I bought is reliable. |
| whose | Shows possession or connection. | The student whose bag disappeared reported it. |
| where | Connects a place with an action. | This is the café where we met. |
| when | Connects a time with an event. | Friday is the day when we travel. |
| Commas with which | Adds non-identifying information about a known noun. | The library, which reopened recently, is busy. |
Stage 1 of 5
Understand
What it means, when to use it, and mistakes to avoid.
The full explanation
An adjective clause is a group of words containing a subject and a verb that functions like a descriptive adjective. It attaches to a noun to clarify which person or item you mean, or to add descriptive detail about a noun that is already specific. Who refers to people, which refers to things, that refers to things or people in defining contexts, whose indicates possession, and where or when connect physical locations or points in time.
The technician who repaired the printer left his contact card on the counter.
Why it works: The clause identifies which technician visited, so it takes no commas.
3 more examples
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Our main office, which opened ten years ago, needs a new security system.
Our main office is already specific, so the clause adds bonus facts and takes commas.
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The customer whose luggage was delayed waited near the service desk.
Whose shows that the luggage belongs to the customer.
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The hotel where we organized the annual conference has plenty of parking spaces.
Where specifies the location where the event took place.
Read the full guide
Locate the noun before the clause
Before you evaluate any descriptive clause, find the specific noun that sits directly in front of the connecting word. An adjective clause always works by attaching itself to that preceding noun. Even when a sentence contains several nouns, the clause only describes the one noun placed right before the relative pronoun.
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The architect who designed the community clinic shared the blueprints yesterday.
Why it works: The clause who designed the community clinic attaches directly to the architect.
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We inspected the package that arrived by courier early this morning.
Why it works: The clause that arrived by courier early this morning attaches directly to the package.
Your turn
In the sentence 'The mechanic who inspected the brakes found an oil leak', which noun does the clause describe?
Answer: The mechanic
Show the answer
Answer: The mechanic
The clause who inspected the brakes stands immediately after the mechanic and explains which person performed the inspection.
Choose between who and which
Your choice of relative pronoun depends entirely on whether the noun before the clause is a person or a thing. Use who when you describe human beings, such as coworkers, doctors, or passengers. Use which or that when you describe inanimate objects, abstract ideas, or animals without individual names.
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The driver who picked us up from the terminal knew a faster route.
Why it works: The noun driver represents a person, requiring the pronoun who.
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The bus which stops near City Hall runs every fifteen minutes.
Why it works: The noun bus represents a vehicle, requiring which or that.
You can practise this again in Adjective clauses: choose the right word and If Clauses: Real and Imagined Situations.
Your turn
Which relative pronoun correctly completes this sentence: 'The accountant ______ audited our receipts identified two calculation errors'?
Answer: who
Show the answer
Answer: who
Accountant is a person, so standard English uses who to begin the descriptive clause.
Decide whether the information identifies the noun
Ask yourself whether your listener needs the descriptive clause to know which exact item you mean. When a noun could refer to many possible things, the clause narrows down the group to one specific target. Because that clarifying clause is essential for understanding the identity, you write it without any commas.
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Workers who wear protective goggles avoid common eye injuries.
Why it works: The clause limits the statement only to workers wearing goggles, so no commas are used.
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The key that opens the storage shed hangs next to the window.
Why it works: The clause specifies which key out of many keys opens the shed.
Your turn
Why does 'Students who complete the assignment early may leave the lecture room' have no commas?
Answer: The clause identifies which specific students are allowed to leave early.
Show the answer
Answer: The clause identifies which specific students are allowed to leave early.
The clause restricts the permission to a specific subset of students, making the information identifying and comma-free.
Use commas around non-essential details
When a noun is already clearly identified by a proper name, a possessive word, or unique context, the clause merely supplies supplementary information. The listener already knows the precise noun you mean without the extra words. In that situation, separate the clause with commas, and remember never to substitute the word that for which.
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Doctor Patel, who joined the clinic last summer, specializes in pediatric care.
Why it works: Doctor Patel is already a specific person by name, so the clause is set off with commas.
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My personal laptop, which I bought two years ago, runs all our design programs smoothly.
Why it works: My personal laptop identifies the exact machine, making the purchase date extra information.
Your turn
Which sentence uses commas correctly for supplementary information?
Answer: The warehouse, which stores our paper goods, sits near the river.
Show the answer
Answer: The warehouse, which stores our paper goods, sits near the river.
The descriptive clause is enclosed by commas on both sides and uses which rather than that.
Show possession by using whose
When you want to connect a noun to something that belongs to it, replace words like his, her, or their with whose. The word whose combines the identifying function of a relative pronoun with the meaning of ownership. It can describe both people and organizations, followed directly by the noun being possessed.
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The photographer whose camera broke during the reception borrowed my spare lens.
Why it works: Whose camera replaces his or her camera to connect the owner and the device.
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We contacted the agency whose proposal offered the most practical timeline.
Why it works: Whose proposal links the organization to the document it created.
Your turn
Which sentence correctly indicates ownership?
Answer: The patient whose prescription was lost spoke with the pharmacist.
Show the answer
Answer: The patient whose prescription was lost spoke with the pharmacist.
Whose shows that the prescription belongs to the patient.
Connect locations and times with where and when
When your descriptive clause explains what happens at a specific physical location, introduce it with where. When your clause explains an event tied to a calendar date, time, or period, introduce it with when. These connectors clarify the setting of an action without requiring clumsy preposition phrases like in which or at which.
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The cafeteria where we eat lunch offers three vegetarian choices every day.
Why it works: Where identifies the physical place where the team eats lunch.
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July is the month when the maintenance crew repairs the heating pipes.
Why it works: When specifies the time period during which the repairs take place.
Your turn
Select the natural connector for this sentence: 'The workshop room ______ the seminar met has excellent acoustics.'
Answer: where
Show the answer
Answer: where
Workshop room is a location where an action happens, making where the correct connector.
Notice when speakers drop relative pronouns
Native speakers frequently omit that, which, or whom when the pronoun functions as an object inside the clause. If you hear a noun immediately followed by a new subject and verb, a connecting pronoun has been dropped. You can only omit the pronoun when a separate subject follows, never when the pronoun itself acts as the subject.
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The contract we signed this morning guarantees delivery within three business days.
Why it works: The pronoun that is omitted between contract and the subject we.
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The supplier who quoted the lowest price won the contract.
Why it works: Who cannot be dropped here because it serves as the subject performing the action quoted.
Your turn
In which sentence can the pronoun 'that' be naturally omitted?
Answer: The report that we discussed yesterday was rewritten.
Show the answer
Answer: The report that we discussed yesterday was rewritten.
In this sentence, we is the subject of discussed, making that an object pronoun that can be dropped.
Avoid repeating the subject pronoun
A frequent error occurs when writers introduce a relative pronoun and then accidentally retain the original pronoun later in the clause. The relative pronoun already acts as the subject or object of the clause, so adding words like he, it, or them creates an unnecessary duplicate. Remove the extra pronoun to keep the clause clean and grammatical.
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The coffee machine that makes espresso broke down during the morning rush.
Why it works: Notice that the sentence does not say 'that it makes espresso'.
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The technician who repaired the wiring answered all our questions.
Why it works: The sentence does not repeat 'he repaired' after who.
Your turn
Which sentence contains an unnecessary duplicate pronoun error?
Answer: The laptop that it shut down suddenly needs a new battery.
Show the answer
Answer: The laptop that it shut down suddenly needs a new battery.
The pronoun it unnecessarily duplicates the subject role already played by that.
Common mistakes
What learners often say, what to say instead, and why.
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Not this:
The engineer which designed the bridge won an award.Say: The engineer who designed the bridge won an award.
Use who for a person, not which.
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Not this:
My bicycle, that I bought last month, needs repairs.Say: My bicycle, which I bought last month, needs repairs.
Non-identifying clauses use which, not that.
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Not this:
The film that it won three awards is showing tonight.Say: The film that won three awards is showing tonight.
Do not repeat the subject pronoun after a relative pronoun.
-
Not this:
The jacket who I ordered has arrived.Say: The jacket I ordered has arrived.
The jacket is a thing, and the object pronoun can be omitted here.
Questions about "Adjective clauses: identify the noun"
Can I use 'that' instead of 'who' when talking about people?
In informal conversational English, many people use that to describe a person in identifying clauses, such as 'the clerk that helped us'. However, in professional writing and exams, who is strongly preferred because it respects the distinction between people and objects. In non-identifying clauses with commas, you must always use who and never that.
The teacher who graded our essays provided detailed feedback.
The teacher that helped us was very patient.
When is it acceptable to leave out 'who', 'which', or 'that'?
You can omit the pronoun only when it acts as the grammatical object of the clause, meaning another subject performs the action. For instance, in 'the coat that I purchased', the word I is the subject, so you can safely drop that. If the pronoun itself performs the action as the subject, as in 'the dog that barked', you must keep it.
The coat I purchased keeps me warm in freezing weather.
The technician who repaired our screen arrived on schedule.
Why do commas change the meaning of a sentence with an adjective clause?
Commas signal to your reader whether the clause defines the noun or merely adds supplementary details. Without commas, the clause tells the reader which specific item you mean out of many possibilities. With commas, the reader already knows the exact item, and the clause can be removed without causing any identity confusion.
My brother who lives in Boston is a surgeon.
My brother, who lives in Boston, is a surgeon.
Can I use 'whose' to describe objects and organizations, or only people?
Although whose typically refers to people, standard English also uses whose for companies, buildings, and objects to avoid awkward constructions like 'the roof of which'. Using whose for inanimate items is completely normal in modern writing when indicating possession or parts of an entity.
We visited a museum whose collection includes ancient coins.
I work for a firm whose headquarters are located in Chicago.
Before you go
Remember this
Find the noun immediately before the clause. If that clause answers the question of which specific noun you mean, write it without commas. If the noun is already identified by name or clear context, wrap the clause in commas and avoid using the word that.
Stage 2 of 5
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Listening 1 of 4
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Read the transcript
The driver who arrived early helped us carry the luggage.
The clause 'who arrived early' identifies which driver gave assistance and connects smoothly to the verb helped.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
Listening 2 of 4
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Read the transcript
The shop where everyone buys fresh fruit sells homemade bread.
Where introduces an adjective clause showing what customers do inside that specific retail location.
Try a longer clip. Listen once, then replay the part you missed.
Listening 3 of 4
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Read the transcript
Our new consultant, who always oversees foreign operations, will evaluate our regional contracts this afternoon to confirm every requirement.
Because the consultant is already identified by context, the extra information clause is set off with commas and uses who.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
This clip is longer. Follow the instruction above the answer field.
Listening 4 of 4
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Read the transcript
The supervisor who oversees our building renovation shared an updated schedule during lunch. She pointed out two conference rooms that open onto the terrace. An electrician whose agency installed our cabling will arrive early on Tuesday, and employees who occupy that wing will move temporarily to another floor.
Identifying adjective clauses with who, that, and whose precisely define the people and spaces involved in the renovation.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
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The driver who arrived early helped us carry the luggage.
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Describe a public facility in your town, explaining what services it offers and describing the staff members who work there in twenty to thirty seconds.
Use: adjective clauses: identify the noun
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