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Relative Clauses with Quantifiers: Most of Whom, All of Which

In formal English, quantifiers (most, all, some, none, many, several, both) combine with of whom (people) or of which (things) inside non-defining relative clauses to describe part of a group.

Grammar Rule in 30 Seconds

Use 'of whom' for people and 'of which' for things when adding a quantifier to a relative clause.

  • Use 'whom' for people: 'I have three brothers, all of whom are doctors.'
  • Use 'which' for things: 'I read many books, most of which were boring.'
  • Always include the preposition 'of' before the pronoun.
Noun + , + [Quantifier] + of + [whom/which] + Verb...

مرور کلی

## Structure
Quantifier + of + whom/which
This structure sits inside a non-defining relative clause:
[Noun phrase], [quantifier] of [whom/which] [+ rest of clause], ...
  • The attendees, most of whom had registered online, arrived early.
  • The files, several of which dated back decades, were digitised.
## Common Quantifiers
| Quantifier | People (whom) | Things (which) |
|---|---|---|
| all | all of whom | all of which |
| most | most of whom | most of which |
| many | many of whom | many of which |
| some | some of whom | some of which |
| several | several of whom | several of which |
| none | none of whom | none of which |
| both | both of whom | both of which |
| each | each of whom | each of which |
| half | half of whom | half of which |
## Formal vs Informal
| Informal | Formal (relative clause) |
|---|---|
| The experts came — most of them disagreed. | The experts, most of whom disagreed, came. |
| I have three chapters — I have read all of them. | I have three chapters, all of which I have read. |
## With Numbers
  • We interviewed twelve candidates, three of whom were shortlisted.
  • The board approved six proposals, two of which required further funding.
## Key Rule
Use whom (not who) here — it is the object form after a preposition:
✅ most of whom ❌ most of who

Relative Clause Structure

Noun Quantifier Preposition Pronoun Verb
The guests
most
of
whom
arrived
The files
some
of
which
are missing
The players
all
of
whom
trained
The ideas
none
of
which
worked
The books
many
of
which
are old
The staff
each
of
whom
helped

Meanings

This structure allows you to add specific information about a subset of a group previously mentioned in the sentence.

1

People (Whom)

Referring to a subset of a group of people.

“He invited ten friends, most of whom arrived late.”

“The students, none of whom had studied, failed the test.”

2

Things/Concepts (Which)

Referring to a subset of a group of inanimate objects or abstract ideas.

“I bought five apples, two of which were rotten.”

“The laws, some of which are outdated, need revision.”

Reference Table

Reference table for Relative Clauses with Quantifiers: Most of Whom, All of Which
Form Structure Example
Affirmative
Noun, Q of whom/which V
The team, all of whom are ready, waits.
Negative
Noun, none of whom/which V
The plans, none of which are ready, fail.
Question
Are there N, Q of whom/which V?
Are there people, any of whom can help?
Past Tense
Noun, Q of whom/which V-ed
The cars, most of which were sold, left.
Passive
Noun, Q of whom/which be V-ed
The cakes, all of which were eaten, gone.

طیف رسمیت

رسمی
The candidates, most of whom are qualified, were interviewed.

The candidates, most of whom are qualified, were interviewed. (Job interview)

خنثی
The candidates, most of whom are qualified, had an interview.

The candidates, most of whom are qualified, had an interview. (Job interview)

غیر رسمی
The candidates, most of them are qualified, had an interview.

The candidates, most of them are qualified, had an interview. (Job interview)

عامیانه
The candidates, like, most of them are good, got interviewed.

The candidates, like, most of them are good, got interviewed. (Job interview)

Relative Clause Quantifiers

Quantifier + of + Pronoun

People

  • whom for humans

Things

  • which for objects

مثال‌ها بر اساس سطح

1

I have two cats, both of which are black.

Tengo dos gatos, ambos de los cuales son negros.

1

The students, many of whom are tired, want to go home.

Los estudiantes, muchos de los cuales están cansados, quieren irse a casa.

1

I read three books, all of which were interesting.

Leí tres libros, todos los cuales fueron interesantes.

1

The employees, none of whom were informed, were surprised.

Los empleados, ninguno de los cuales fue informado, estaban sorprendidos.

1

The proposals, several of which were rejected, were reviewed by the board.

Las propuestas, varias de las cuales fueron rechazadas, fueron revisadas por la junta.

1

The witnesses, each of whom provided a different account, were cross-examined.

Los testigos, cada uno de los cuales proporcionó un relato diferente, fueron interrogados.

به‌راحتی اشتباه گرفته می‌شود

Relative Clauses with Quantifiers: Most of Whom, All of Which در مقابل Relative Clauses (Standard)

Learners forget the quantifier and the comma.

Relative Clauses with Quantifiers: Most of Whom, All of Which در مقابل Participle Clauses

They look similar but don't use 'of whom'.

Relative Clauses with Quantifiers: Most of Whom, All of Which در مقابل Appositive Phrases

They also use commas but lack the relative pronoun.

اشتباهات رایج

All who are...

All of whom are...

Missing the preposition 'of'.

Most which are...

Most of which are...

Missing 'of'.

The people, all of who...

The people, all of whom...

Using 'who' instead of 'whom' after a preposition.

The books, all of which they are old...

The books, all of which are old...

Redundant subject pronoun.

الگوهای جمله‌سازی

I have ___ friends, all of whom are ___.

The ___ , most of which are ___, are on the table.

The team members, none of whom ___, left early.

The cities, several of which ___, are beautiful.

Real World Usage

Professional Report very common

The results, most of which are positive, are attached.

Academic Essay very common

The theories, none of which are proven, are debated.

Job Interview common

I led a team, all of whom were experts.

Social Media occasional

I met many people, some of whom were cool.

Travel Blog common

I visited many sites, all of which were historic.

Food Delivery App rare

The items, all of which are fresh, are ready.

💡

The Comma Rule

Always use a comma before and after the clause if it's in the middle of the sentence.
⚠️

Don't forget 'of'

It is a common mistake to say 'all whom'. Always include 'of'.
🎯

Use 'whom' for people

In formal writing, 'whom' is required for people.
💬

Formal vs Informal

In casual speech, people often just say 'most of them'. Save this structure for writing.

Smart Tips

Use this structure to sound more professional.

The results are good. Most of them are positive. The results, most of which are positive, are good.

Always use 'whom' for people.

The guests, all of who were happy... The guests, all of whom were happy...

Combine them to improve flow.

I have many books. Some of them are old. I have many books, some of which are old.

If it's extra info, use a comma.

The cars all of which are red are fast. The cars, all of which are red, are fast.

تلفظ

/huːm/

Whom

Pronounced like 'hoom'.

Rising-falling

The group, ↗most of whom are here, ↘are ready.

Provides extra info.

حفظ کنید

روش یادسپاری

Whom is for the human, Which is for the switch (object).

تداعی تصویری

Imagine a group of people holding hands (whom) and a group of light switches on a wall (which).

Rhyme

For people use whom, for things use which, don't forget the 'of' or you'll hit a glitch.

Story

I invited five chefs to my party. All of whom were famous. They brought five cakes, most of which were delicious. Everyone was happy.

شبکه واژگان

allmostsomenonemanyseveraleachboth

چالش

Write 5 sentences about your family or your belongings using this structure.

نکات فرهنگی

Highly formal, often used in BBC news.

Used in formal writing, but 'who' is increasingly common in speech.

Standard across all English-speaking universities.

This construction evolved from the Latinate influence on English, where partitive genitives were common.

شروع‌کننده‌های مکالمه

How many friends do you have, and what are they like?

Tell me about the books you own.

Describe your colleagues.

What about the movies you've seen recently?

موضوعات نگارش

Describe your family members.
Write about your favorite collection of items.
Discuss the challenges of your current job or studies.
Reflect on the cities you have visited.

اشتباهات رایج

Incorrect

صحیح


Incorrect

صحیح


Incorrect

صحیح


Incorrect

صحیح

Test Yourself

Fill in the blank with 'whom' or 'which'.

The students, all of ___ are here, are ready.

✓ Correct! ✗ Not quite. Correct answer: whom
Students are people, so we use whom.
Choose the correct sentence. چند گزینه‌ای

Which is correct?

✓ Correct! ✗ Not quite. Correct answer: The cars, all of which are red.
Cars are things, so we use which.
Find the error. Error Correction

Find and fix the mistake:

The people, all who are here, are nice.

✓ Correct! ✗ Not quite. Correct answer: all of whom
Need 'of whom' after a preposition.
Combine the sentences. Sentence Transformation

I have three brothers. All of them are doctors.

✓ Correct! ✗ Not quite. Correct answer: I have three brothers, all of whom are doctors.
Correct structure.
Match the quantifier to the context. جفت کردن

Match each item on the left with its pair on the right:

✓ Correct! ✗ Not quite. Correct answer: all - people
All can be used for both.
Order the words. Sentence Building

are / which / of / most / The / books / old

✓ Correct! ✗ Not quite. Correct answer: The books, most of which are old.
Correct word order.
Choose the correct verb. Conjugation Drill

The team, all of whom ___ (is/are) ready.

✓ Correct! ✗ Not quite. Correct answer: are
Team members are plural.
Is this rule true? True False Rule

You must use a comma with this structure.

✓ Correct! ✗ Not quite. Correct answer: True
These are non-defining clauses.

Score: /8

تمرین‌های عملی

8 exercises
Fill in the blank with 'whom' or 'which'.

The students, all of ___ are here, are ready.

✓ Correct! ✗ Not quite. Correct answer: whom
Students are people, so we use whom.
Choose the correct sentence. چند گزینه‌ای

Which is correct?

✓ Correct! ✗ Not quite. Correct answer: The cars, all of which are red.
Cars are things, so we use which.
Find the error. Error Correction

Find and fix the mistake:

The people, all who are here, are nice.

✓ Correct! ✗ Not quite. Correct answer: all of whom
Need 'of whom' after a preposition.
Combine the sentences. Sentence Transformation

I have three brothers. All of them are doctors.

✓ Correct! ✗ Not quite. Correct answer: I have three brothers, all of whom are doctors.
Correct structure.
Match the quantifier to the context. جفت کردن

Match the best fit.

✓ Correct! ✗ Not quite. Correct answer: all - people
All can be used for both.
Order the words. Sentence Building

are / which / of / most / The / books / old

✓ Correct! ✗ Not quite. Correct answer: The books, most of which are old.
Correct word order.
Choose the correct verb. Conjugation Drill

The team, all of whom ___ (is/are) ready.

✓ Correct! ✗ Not quite. Correct answer: are
Team members are plural.
Is this rule true? True False Rule

You must use a comma with this structure.

✓ Correct! ✗ Not quite. Correct answer: True
These are non-defining clauses.

Score: /8

سوالات متداول (8)

No, 'that' cannot be used after a preposition like 'of'.

In formal writing, yes. In casual speech, people often use 'who'.

Because this is a non-defining relative clause that adds extra info.

Yes, use 'of whom'.

Yes, use 'of which'.

The quantifier usually implies a plural group, so the verb is usually plural.

Yes, it's very common in professional emails.

Forgetting the 'of'.

Scaffolded Practice

1

1

2

2

3

3

4

4

Mastery Progress

Needs Practice

Improving

Strong

Mastered

In Other Languages

Spanish high

de los cuales

Spanish requires gender agreement (de los/las cuales).

French moderate

dont

French 'dont' is more versatile but less specific than 'of whom'.

German high

von denen

German doesn't distinguish between people and things here.

Japanese low

no uchi no

Japanese is agglutinative and lacks relative pronouns.

Arabic moderate

minhum

Arabic is highly synthetic compared to English.

Chinese low

de zhong

Chinese lacks relative pronouns entirely.

Learning Path

Prerequisites

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