Adverbial Clauses

Adverbial clauses are dependent clauses that function as adverbs, modifying verbs, adjectives, or entire sentences. They tell us about time, reason, result, condition, purpose, and concession of actions.

---

1. Overview of Adverbial Clauses

1.1. Definition

Adverbial clauses are dependent clauses that add information about time, place, reason, result, purpose, condition, concession, and manner to the main clause.

1.2. Position in Sentence

Position	Structure	Example
Beginning (with comma)	Adv. clause, + main clause	When I arrived, she had left.
End (no comma)	Main clause + adv. clause	She had left when I arrived.

---

2. Types of Adverbial Clauses

2.1. Time Clauses

Tell us WHEN an action happens.

Conjunction	Meaning	Example
When	When	When I was young, I lived in Hanoi.
While	While, during	She was cooking while he was watching TV.
As	When, while	As I was leaving, the phone rang.
Before	Before	I will call you before I leave.
After	After	After she finished work, she went home.
As soon as	As soon as	As soon as I see him, I’ll tell him.
Until/Till	Until	Wait here until I come back.
Since	Since	I have lived here since I was born.
Whenever	Whenever	Whenever I see her, I feel happy.
By the time	By the time	By the time you arrive, I will have left.

Note on tenses:

Main clause (Future)	Adverbial clause (Present)
I will call you	when I arrive.
She will have finished	by the time you get here.
❌ …when I will arrive.	✅ …when I arrive.

2.2. Reason/Cause Clauses

Tell us WHY an action happens.

Conjunction	Meaning	Example
Because	Because	She stayed home because she was sick.
Since	Since (known fact)	Since you’re here, let’s start.
As	As, because	As it was late, we went home.
Now that	Now that	Now that you’ve graduated, what’s your plan?
Seeing that	Seeing that	Seeing that no one objected, the proposal was accepted.
Given that	Given that	Given that the weather is bad, we should postpone.

2.3. Result Clauses

Tell us what the RESULT of an action is.

Structure	Meaning	Example
So + adj/adv + that	So… that	She is so kind that everyone loves her.
Such + (a/an) + adj + N + that	Such… that	It was such a hot day that we stayed inside.
So + many/much/few/little + N + that	So many/much that	There were so many people that I couldn’t see.

2.4. Purpose Clauses

Tell us the PURPOSE of an action.

Conjunction	Meaning	Example
So that	So that	He studies hard so that he can pass the exam.
In order that	In order that (formal)	We left early in order that we might arrive on time.

Note: Purpose clauses usually have modal verbs: can, could, may, might, will, would.

2.5. Condition Clauses

Tell us the CONDITION for an action to happen.

Conjunction	Meaning	Example
If	If	If it rains, I will stay home.
Unless	Unless (= if… not)	Unless you hurry, you’ll miss the bus.
Provided (that)	Provided that	I’ll go provided (that) you go too.
As long as	As long as	As long as you study, you’ll pass.
In case	In case	Take an umbrella in case it rains.
Suppose/Supposing	Suppose	Suppose you won the lottery, what would you do?
Even if	Even if	Even if I’m tired, I’ll come.

2.6. Concession Clauses

Express CONTRAST or concession.

Conjunction	Meaning	Example
Although	Although	Although he is rich, he is not happy.
Though	Though (less formal)	Though tired, she continued working.
Even though	Even though (emphasis)	Even though I explained, he didn’t understand.
While/Whereas	While (contrast)	While Tom is tall, his brother is short.
No matter + Wh-	No matter	No matter what you say, I won’t change my mind.
However + adj/adv	However	However hard he tries, he fails.

2.7. Manner Clauses

Tell us HOW an action is performed.

Conjunction	Meaning	Example
As	As, like	Do as I say.
As if/As though	As if	He speaks as if he knew everything.
The way	The way	I did it the way you told me.

2.8. Place Clauses

Tell us WHERE an action happens.

Conjunction	Meaning	Example
Where	Where	Stay where you are.
Wherever	Wherever	Wherever you go, I’ll follow.
Everywhere	Everywhere	Everywhere I look, I see her face.

2.9. Comparison Clauses

Used to COMPARE two things or actions.

Structure	Example
As + adj/adv + as	She is as tall as her mother (is).
Not as/so + adj/adv + as	He is not as smart as his brother (is).
More/Less… than	She is more beautiful than I thought.
The + comparative…, the + comparative	The harder you work, the more you earn.

---

3. Reducing Adverbial Clauses

3.1. When to Reduce?

When the subject of both clauses is the SAME.

3.2. How to Reduce

Type	Full	Reduced
Active	While she was walking, she saw him.	While walking, she saw him.
Passive	After he was told the news, he cried.	After being told the news, he cried.
Having + V3 (completed before)	After she had finished the work, she left.	Having finished the work, she left.
Being + V3 (passive)	Because he was tired, he went to bed.	Being tired, he went to bed.

---

4. Common Mistakes

❌ Wrong → ✅ Correct

Mistake	Correction	Explanation
I will call you when I will arrive.	I will call you when I arrive.	Time clauses: don’t use “will”
Although he was tired, but he continued.	Although he was tired, he continued.	Don’t use “although” + “but” together
He is so a good student that…	He is such a good student that…	Such + a/an + adj + N
Despite he was tired, he worked.	Although he was tired, he worked.	Despite + N/V-ing, not + clause
Because of she was sick, she stayed.	Because she was sick, she stayed.	Because of + N/V-ing; Because + clause
Unless you don’t study, you’ll fail.	Unless you study, you’ll fail.	Unless = if… not (already negative)

---

5. IELTS Applications

IELTS Writing Task 2

Time clauses:

• Since industrialization began, pollution has increased significantly.

Reason clauses:

• Because technology has advanced rapidly, communication has become easier.

Result clauses:

• The population has grown so rapidly that cities are becoming overcrowded.

Concession clauses:

• Although governments have implemented policies, the problem persists.

Condition clauses:

• If stricter regulations are enforced, the situation will improve.

Purpose clauses:

• Governments should invest in education so that citizens can be better informed.

---

6. Summary

Type	Main Conjunctions	Example
Time	when, while, before, after, as soon as, until, since	When I arrived, she left.
Reason	because, since, as, now that	She’s happy because she passed.
Result	so… that, such… that	He was so tired that he slept.
Purpose	so that, in order that	Study hard so that you can pass.
Condition	if, unless, provided that, as long as	If it rains, I’ll stay home.
Concession	although, though, even though, while	Although he’s rich, he’s unhappy.
Manner	as, as if, as though	Do it as I told you.
Place	where, wherever	Go wherever you want.
Comparison	as… as, than	She is as tall as her mother.