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Explanations + Extra Practice Activities

🌟 How to Reduce Clauses in English

Easy Grammar Guide with Clear Rules and Correct Examples

Reducing clauses helps your English sound more natural, smoother, and more advanced. It is common in speaking and writing.

📘 What Is a Clause?

A clause usually has a subject + verb.

Examples:

She is studying.
He works hard.
If you study, you will pass.

A reduced clause is a shorter form of a clause.

✂️ What Happens When We Reduce a Clause?

We often remove:

subject pronouns
helping verbs (is, are, was, were)
relative pronouns (who, which, that)

We often change verbs to:

-ing form
past participle
to + verb

⚠️ Important General Rule

Reduce a clause only when the grammar and meaning stay clear.

For adverb clauses, the subject of the reduced clause should usually be the same as the subject of the main clause.

✅ After finishing dinner, he went out.
❌ After finishing dinner, the phone rang.

🔵 1. Active Adjective Clauses

(Active Relative Clauses)

These clauses describe a noun doing an action.

Rule

If the adjective clause contains who / that / which + verb, you can often reduce it to verb + ing.

Remove:

who / that / which
sometimes be verbs

Use:

present participle (-ing)

Full Clauses

The man who is talking is my teacher.
The girl who is singing is my sister.
Students who study hard succeed.
The boy who lives next door is friendly.

Reduced Clauses

The man talking is my teacher.
The girl singing is my sister.
Students studying hard succeed.
The boy living next door is friendly.

🔵 2. Passive Adjective Clauses

(Passive Relative Clauses)

These clauses describe a noun receiving an action.

Rule

If the adjective clause contains who / that / which + be + past participle, reduce it to the past participle.

Remove:

who / that / which
be verb

Use:

past participle

Full Clauses

The car that was damaged was expensive.
The house which was built in 1920 is beautiful.
The email that was sent yesterday was important.
The food that was prepared here is delicious.

Reduced Clauses

The car damaged was expensive.
The house built in 1920 is beautiful.
The email sent yesterday was important.
The food prepared here is delicious.

🔵 3. Adjective Clauses of Possession

(Relative Clauses of Possession)

These clauses show that someone has / owns / possesses something.

They often use:

who has
who have
sometimes with

Rule

If the clause means has / have, we can often reduce it by changing:

who has → with + noun
who have → with + noun

This is very common in spoken and written English.

Full Clauses

The student who has a laptop is absent today.
The man who has a beard is my uncle.
The woman who has three children works here.
Students who have experience often do well.
People who have passports can enter first.
The company that has offices in Canada is growing fast.

Reduced Clauses

The student with a laptop is absent today.
The man with a beard is my uncle.
The woman with three children works here.
Students with experience often do well.
People with passports can enter first.
The company with offices in Canada is growing fast.

🔵 4. Wh- Noun Clauses

These clauses act as nouns.

Rule

When the meaning is about obligation, choice, method, direction, or action, many wh- noun clauses can be reduced to:

wh-word + to + verb

Examples:

what to do
where to go
how to fix it
when to leave

Full Clauses

I know what I should say.
Tell me where I should go.
She learned how she could fix it.
We discussed when we should leave.

Reduced Clauses

I know what to say.
Tell me where to go.
She learned how to fix it.
We discussed when to leave.

🔵 5. Adverb Clauses of Time

These clauses show when something happens.

Rule

If the subject of both clauses is the same, you can often reduce the adverb clause.

Remove:

subject
helping verb

Use:

verb + ing
sometimes having + past participle for earlier completed action

Full Clauses

After he finished work, he went home.
Before she left, she called me.
While I was walking, I saw a dog.
After he had eaten, he went out.

Reduced Clauses

After finishing work, he went home.
Before leaving, she called me.
While walking, I saw a dog.
After having eaten, he went out. (formal)

🔵 6. Adverb Clauses of Condition

These clauses show conditions.

Rule

Condition clauses can sometimes be reduced, especially in formal writing.

Common patterns:

if + past participle
unless + past participle
once + past participle

Active reductions with -ing are uncommon and often unnatural.

Full Clauses

If it is handled carefully, it will last longer.
Unless it is fixed soon, it will fail.
Once it is approved, we can begin.
If they are invited, they will come.

Reduced Clauses

If handled carefully, it will last longer.
Unless fixed soon, it will fail.
Once approved, we can begin.
If invited, they will come.

🌟 Final Tip

Use reduced clauses to make your English:

✅ shorter
✅ smoother
✅ more natural
✅ more advanced

Extra Practice Activities

📝 Clause Reduction Quiz

5 Questions for Each Type (30 Questions Total)

Choose the best reduced form of each sentence.

🔵 1. Active Adjective Clauses

(Active Relative Clauses)

1. The man who is waiting outside is my boss.

A) The man waiting outside is my boss.
B) The man waited outside is my boss.
C) The man to wait outside is my boss.

✅ Answer: A

2. Students who work hard usually succeed.

A) Students worked hard usually succeed.
B) Students to work hard usually succeed.
C) Students working hard usually succeed.

✅ Answer: C

3. The girl who is smiling is my cousin.

A) The girl smiling is my cousin.
B) The girl smiled is my cousin.
C) The girl to smile is my cousin.

✅ Answer: A

4. People who live near the beach love the view.

A) People lived near the beach love the view.
B) People living near the beach love the view.
C) People to live near the beach love the view.

✅ Answer: B

5. The dog that is barking loudly is ours.

A) The dog barking loudly is ours.
B) The dog barked loudly is ours.
C) The dog to bark loudly is ours.

✅ Answer: A

🔵 2. Passive Adjective Clauses

(Passive Relative Clauses)

6. The package that was delivered today is mine.

A) The package delivering today is mine.
B) The package delivered today is mine.
C) The package to deliver today is mine.

✅ Answer: B

7. The house that was built in 1980 is still strong.

A) The house built in 1980 is still strong.
B) The house building in 1980 is still strong.
C) The house to build in 1980 is still strong.

✅ Answer: A

8. The email that was sent yesterday was important.

A) The email sending yesterday was important.
B) The email to send yesterday was important.
C) The email sent yesterday was important.

✅ Answer: C

9. The road that was damaged by rain is closed.

A) The road damaged by rain is closed.
B) The road damaging by rain is closed.
C) The road to damage by rain is closed.

✅ Answer: A

10. The food that was prepared here tastes great.

A) The food preparing here tastes great.
B) The food prepared here tastes great.
C) The food to prepare here tastes great.

✅ Answer: B

🔵 3. Adjective Clauses of Possession

(who has / who have → with + noun)

11. The woman who has long hair is my teacher.

A) The woman having long hair is my teacher.
B) The woman long hair is my teacher.
C) The woman with long hair is my teacher.

✅ Answer: C

12. Workers who have experience can apply first.

A) Workers with experience can apply first.
B) Workers experiencing can apply first.
C) Workers experienced can apply first.

✅ Answer: A

13. The boy who has blue eyes is my nephew.

A) The boy with blue eyes is my nephew.
B) The boy having blue eyes is my nephew.
C) The boy blue eyes is my nephew.

✅ Answer: A

14. Students who have laptops may join online.

A) Students laptops may join online.
B) Students having laptops may join online.
C) Students with laptops may join online.

✅ Answer: C

15. The man who has a beard is my uncle.

A) The man beard is my uncle.
B) The man with a beard is my uncle.
C) The man having a beard is my uncle.

✅ Answer: B

🔵 4. Wh- Noun Clauses

16. I don’t know what I should do.

A) I don’t know what to do.
B) I don’t know what doing.
C) I don’t know what did.

✅ Answer: A

17. Tell me where I should park.

A) Tell me where parked.
B) Tell me where to park.
C) Tell me where parking.

✅ Answer: B

18. She learned how she could fix it.

A) She learned how fixing it.
B) She learned how fixed it.
C) She learned how to fix it.

✅ Answer: C

19. We discussed when we should leave.

A) We discussed when leaving.
B) We discussed when left.
C) We discussed when to leave.

✅ Answer: C

20. He asked which train he should take.

A) He asked which train to take.
B) He asked which train taking.
C) He asked which train took.

✅ Answer: A

🔵 5. Adverb Clauses of Time

21. After she finished work, she went home.

A) After finished work, she went home.
B) After to finish work, she went home.
C) After finishing work, she went home.

✅ Answer: C

22. Before he left, he called me.

A) Before leaving, he called me.
B) Before left, he called me.
C) Before to leave, he called me.

✅ Answer: A

23. While I was walking home, I saw Tom.

A) While walked home, I saw Tom.
B) While walking home, I saw Tom.
C) While to walk home, I saw Tom.

✅ Answer: B

24. After they ate dinner, they watched TV.

A) After eating dinner, they watched TV.
B) After ate dinner, they watched TV.
C) After to eat dinner, they watched TV.

✅ Answer: A

25. Before she started class, she made coffee.

A) Before started class, she made coffee.
B) Before starting class, she made coffee.
C) Before to start class, she made coffee.

✅ Answer: B

🔵 6. Adverb Clauses of Condition

26. If it is used carefully, it will last longer.

A) If using carefully, it will last longer.
B) If used carefully, it will last longer.
C) If to use carefully, it will last longer.

✅ Answer: B

27. Once it is approved, we can begin.

A) Once to approve, we can begin.
B) Once approving, we can begin.
C) Once approved, we can begin.

✅ Answer: C

28. Unless it is fixed soon, it will fail.

A) Unless fixed soon, it will fail.
B) Unless fixing soon, it will fail.
C) Unless to fix soon, it will fail.

✅ Answer: A

29. If they are invited, they will come.

A) If inviting, they will come.
B) If invited, they will come.
C) If to invite, they will come.

✅ Answer: B

30. Once it is signed, we can move forward.

A) Once signing, we can move forward.
B) Once to sign, we can move forward.
C) Once signed, we can move forward.

✅ Answer: C