Grammar · Lesson 19

Defining relative clauses: attach the clue to the noun

A defining relative clause helps a listener identify the exact person, thing, place, or possession you mean. First name a general category, then attach the essential clue directly to it: the analyst who called, the file that you sent, the room where we met.

60–70 min corenoun + identifying clausesubject gap · object gap · zero relative15–20 min listening and retrieval

NoticeFind the noun and the essential clue.

DiscoverLocate the missing role inside the clause.

ConnectChoose, keep, or omit the relative word.

UseDescribe a precise fictional shortlist.

Can-do: By the end, you can attach an essential identifying clause directly to its noun; use who, which, that, whose, and where accurately; distinguish subject and object gaps; omit an object relative word when the structure allows it; keep subject-verb agreement with the noun being identified; avoid repeated pronouns, misplaced clauses, redundant place prepositions, and what after an expressed noun; recognize more formal preposition patterns; and deliver a connected recommendation whose references remain clear.

Two-minute retrieval

Reactivate the reference tools

1Ask for a person’s identity: manages the project?

2Ask for a location: does the team meet?

3Replace Marta with a subject pronoun: Marta called. left a message.

Notice how one clause narrows a category

Shortlist for a community workshop

Coordinator: Nia. Goal: choose one trainer, one projector, and one room from several possible options.

Let’s invite the trainer who teaches evening classes.

Let’s reserve the projector that Omar tested yesterday.

Let’s use the room where the large tables are stored.

Let’s call the organization whose volunteers ran last year’s workshop.

What general noun comes before each identifying clause?
Does who perform an action, or does another subject follow it?
Does that perform tested, or does Omar?

Discovery check: trace the reference

1In the trainer who teaches evening classes, the clause identifies the noun .

2The relative word who tells the listener that the noun refers to .

3In that first clause, performs the action teaches.

4In the projector that Omar tested, performs tested.

5In the organization whose volunteers ran the workshop, whose volunteers means .

Get to the root: the clause contains one open role

Start with two ideas that repeat the same referent: We need a trainer. The trainer teaches evenings. Join them by placing the identifying information after the noun and replacing the repeated role: We need a trainer who teaches evenings. Inside who teaches evenings, the subject role is now filled by who.

With an object relative, another subject remains: Omar tested the projector becomes the projector that Omar tested. Omar still performs the action. The projector is the unspoken object after tested. Do not add another it.

reference	common defining pattern	complete example
person	who / that	the trainer who teaches evenings
thing	which / that	the projector that Omar tested
possession or association	whose + noun	the group whose volunteers helped
place	where + clause	the room where we store the tables

That is common with people and things in defining clauses. Which is also grammatical for things in defining clauses, although some U.S. editorial styles prefer that. Choose by grammar, clarity, and the style you are using, not by a false rule that defining which is impossible.

Clause anatomy: noun, subject, and open role

1A person performed called: The analyst called left a message.

2In that sentence, the grammatical subject of called refers back to .

3A thing received the action: The form we submitted was accepted.

4Inside that we submitted, performs the action.

5For clear attachment, put the identifying clause it identifies.

6Because that already represents the form, the clause that we submitted needs .

Choose a relative word from the reference you need

Who is the neutral everyday choice for a person. Which refers to a thing. That can refer to either in a defining clause. Whose comes before a noun and expresses possession or a close association. Where means in / at that place.

Reference check: use the only option that completes this sentence

1The sentence must use the person-specific option, not the more general that: The tutor leads the workshop speaks Spanish.

2The sentence must use the thing-specific option, not that: The tablet has the blue case belongs to Nia.

3Use the defining relative that works for either a person or a thing: The projector Omar tested is available.

4The volunteers belong to the organization: Choose the organization volunteers have first-aid training.

5The room is the location of the storage action: Use the room we store the large tables.

6One tutor agrees with a singular head noun: The tutor who evenings is available.

7Several tutors agree with a plural head noun: The tutors who evenings are available.

Keep a subject relative; an object relative may disappear

Use the first word after the relative marker as a quick diagnostic. If a finite verb comes next, the relative word is usually the subject and cannot be omitted: the trainer who teaches evenings. If a separate subject comes next, the relative word is the object and can often be omitted: the trainer who Nia recommended or the trainer Nia recommended.

inside the clause	role	omission
who teaches evenings	who is subject	keep it
that Nia recommended	Nia is subject; that is object	that may be omitted

For a person as object, who is normal in conversation: the trainer who Nia recommended. Whom is more formal and survives especially after a fronted preposition. It is not necessary for the everyday object pattern practiced here.

Omission check: inspect what comes next

1In the trainer who teaches evenings, who performs teaches, so it .

2In the trainer who Nia recommended, Nia performs recommended, so who .

3In the projector that stopped working, that .

4In the projector that the coordinator reserved, performs reserved.

5In that same clause, that represents as the object.

6Therefore, the projector the coordinator reserved is possible because object that .

Control whose, where, and what

Whose is followed by the possessed or associated noun: the group whose volunteers helped. It can refer to a person, organization, and sometimes a thing when the relationship is natural. Where already contains a place relationship: the room where we met means the room in which we met.

What does not normally follow an expressed noun in this pattern. It already means something like the thing that: say I understood what Nia meant, but the point that Nia made. Do not say the point what Nia made.

Boundary check: do not express the same relationship twice

1Identify a tutor through that tutor’s schedule: We need a tutor includes Saturdays.

2Use one complete place relationship with no final preposition: This is the room we work.

3Use the alternative pattern that keeps in with the verb: This is the room .

4An expressed noun, point, comes before the clause: I understood the point Nia made.

5No noun comes before the clause, and the meaning is the thing that: I understood Nia meant.

Essential identification usually has no comma break

A defining clause is part of the noun phrase that identifies the referent. In writing, do not separate it with commas: The volunteers who completed the safety training can supervise the room. This identifies a subset of the volunteers. Compare Our four volunteers, who completed the safety training, can supervise the room. The commas present the clause as extra information about all four. That non-defining pattern is developed at B2.

Information check: which people does the clause select?

1For the essential identifying meaning, write The volunteers who completed the training can supervise with .

2That sentence gives permission to .

3In Please call the trainer who teaches evenings, the listener needs the clause because .

Place prepositions where the register expects them

Everyday English often leaves the preposition at the end: the person I spoke to, the room that we met in. More formal English can move the preposition before whom or which: the person to whom I spoke, the room in which we met. Do not put that after a fronted preposition: the room in that we met.

Register check: preserve the requested style

1Natural conversation with the object relative omitted: Nia is the coordinator .

2Formal written version with the preposition first: Nia is the coordinator .

3Formal written place pattern: The studio has moved.

Sound natural: make the noun and clause one spoken unit

In a defining phrase, do not announce the relative clause with a strong comma-like pause. Keep the noun and identifying clue in one rhythm group: the TRAINer who TEACHes EVEning classes. The relative word is usually unstressed because the important information is the noun and the new clue.

In conversation, object relatives often lose the relative word completely: the PROjector Omar TESTed. Link the noun into the following subject rather than inserting a pause. When that remains, it may be weak /ðət/: the FILE that you SENT. Keep subject who or that audible enough to preserve the clause structure.

Listen for the open role and information focus

1. Why can who not disappear from the first line?

2. What is the clause structure in Clip 2?

3. What happens in the file that I sent?

4. What relationship does whose volunteers express?

5. What register contrast appears in the final line?

Read a shortlist whose references matter

Nia’s fictional workshop note

We need the trainer who teaches evening classes because the workshop begins at 7:00 p.m. I recommend Lena Ortiz, whose recent sessions received strong accessibility feedback. Please reserve the projector Omar tested on Tuesday, not the older unit that loses its connection after ten minutes. We also need the room where the large tables are stored. The volunteers who completed first-aid training can supervise the activity stations; the other volunteers can welcome guests.

Reading check: recover each exact referent

1. Which trainer does Nia’s schedule require?

2. What does whose recent sessions mean?

3. Which projector should the team reserve?

4. Who can supervise the activity stations?

Build one subject clause and one zero object clause

Build 1: keep the subject relative

Identify the available trainer by that person’s teaching schedule.

Build 2: use a zero object relative

Identify the projector by Omar’s test. Omit object that.

Notice and repair the reference

Repair 1: match the human referent

Tap the relative word that treats the engineer as a thing.

Repair 2: remove the repeated object

Tap the extra object pronoun.

Repair 3: express the place relationship once

Tap the redundant preposition.

Play and practice

Games and a short reading that recycle this lesson. Use them as a warm-up, a fast finisher, or homework. Each one checks itself.

Read

Three offices, one choice

Read once for meaning. Then read again and do the tasks below.

Email to a manager158 wordsAbout 1 min

Hi Grace, I visited three office spaces for our team this week. I think we should choose the space that is on Mill Street. It is the only one which has a meeting room for twelve people, and the rent is within our budget.

The agent who showed me around was very helpful. She introduced me to a designer whose company rents the floor above. He told me the building has a quiet cafe where tenants can work in the afternoon.

I liked the Park Avenue space less. It is cheaper, but the rooms are small, and the only kitchen is on another floor. The third space is near the station, but the landlord wants a three-year contract, and the price we discussed was too high.

Could we visit Mill Street together on Friday? The agent who manages the building can meet us at ten. Please bring the list of questions that you wrote last month. Thanks, Marco

Find it

Tap the 7 relative words (who, which, that, whose, or where) that begin a defining relative clause.

Check your understanding

1. Why does Marco prefer the Mill Street space?

2. Whose company rents the floor above the Mill Street space?

3. In “the price we discussed,” which word has been left out?

Crossword

Relative words in context

Click a clue or a square, then type. Press Check when you finish.

Across

Down

Sort it

Keep it or drop it?

Look at what comes after the relative word. Tap a phrase, then tap the box it belongs in. Press Check when the tray is empty.

Unscramble

Build identifying sentences

Tap the words in order to build the sentence. Tap a placed word to send it back.

1. Identify the trainer by schedule.
2. Identify the file. Omit the object relative word.
3. Identify the room by what happens there.
4. Identify the agent by what she did.

Use it without exposing private people or places

You never need to identify a real employer, coworker, client, family member, address, private room, accessibility need, schedule, safety record, device, organization, or personal relationship. Use Nia, Omar, Lena, the workshop, and the fictional rooms and equipment on this page. Real details are optional.

People: Choose a trainer, coordinator, and volunteer group. Give each one an essential clue using who or whose.

Things: Choose one of two projectors and one of two files. Use one subject relative and one zero object relative.

Places: Identify the correct room once with where and once with that ... in. Explain why you would not combine both patterns.

Information: Make every clause necessary to choose the referent. Keep it beside its noun and read it without a comma-like pause.

Final production and check

Final production: present a 75–90 second fictional shortlist

Recommend one person, one organization, one thing, and one place for Nia’s workshop. The listener must choose among at least two options in each category. Use who, one defining that or which, whose + noun, and where. Include one subject relative that cannot be omitted, one zero object relative, and one verb whose number agrees with the noun it identifies.

Evidence check: Can the listener identify every exact referent, locate the subject and open role inside each clause, explain one omission, hear one continuous rhythm group, and distinguish the essential clues from optional extra information?

Final check: defend the identifying structure

1. Which phrase has a required subject relative?

2. Which sentence accurately uses a zero object relative?

3. Which phrase accurately identifies an organization through its volunteers?

Reflect: what exact noun does the clue identify?

Explain the decision path

Complete these ideas aloud: A defining clause is essential when... I keep the relative word when... I may omit it when... Whose is followed by... Where already means... I avoid what after a noun because...

Create one subject relative and one object relative about the same fictional workshop. Underline the subject inside each clause and explain why only one relative word may disappear.

Return tomorrow for the three-item retrieval check before rereading the lesson.

Next-day retrieval

Return without rereading the page. Locate the noun, the subject inside the relative clause, and the role that points back to the noun before selecting an answer.

Three delayed checks

1. Which sentence keeps the required subject relative?

2. What is accurate about the room where we work and the room that we work in?

3. Which sentence uses a zero object relative without repetition?