The clause of purpose is a common grammar topic in English. Most learners often use "to" to express purpose in a simple and concise way. However, there are many other clauses and phrases that express purpose, making your sentences richer and more fluent in both speaking and writing.
In this article, IDP provides a detailed guide to adverbial clauses of purpose, including common structures and examples. Don’t forget to check your understanding with the exercises at the end of the article.
1. What is a Clause of Purpose?
A clause of purpose is a dependent clause that expresses the purpose or intention of an action mentioned in the main clause. These clauses often begin with expressions like to, so as to, in order to, and others.
Examples:
I buy a TV in order that I can watch my favorite football matches.
I set an alarm for tomorrow morning so that I can wake up early.
Common purpose conjunctions include:
Conjunction | Meaning |
|---|---|
to | to (do something) |
in order to / so as to | to (do something) |
so that / in order that | so that |
for | for the purpose of |
in case | in the event of |
2. Common Structures of Clauses of Purpose
There are several purpose clause structures used in different contexts in the IELTS test. Let’s review the most frequent ones with IDP.
2.1. To / In order to / So as to + Base Verb
These three phrases are used in similar ways to express purpose. They are followed by the base form of the verb.
Structure: S + V + to / in order to / so as to + V-inf
Examples:
It is good to have friends in trouble.
I meditate in order to relax.
You should exercise more so as to keep yourself energetic.
2.2. So / In order that / So that + Clause
Structure: S + V + so that / in order that + S + can / could / will / would (not) + V
Examples:
I stepped aside so that she might come in.
Would you add these items in order that we complete the list?
2.3. For + Noun / Gerund
“For” is a common preposition and can also be used to form purpose expressions.
Structure: S + V + for + N / V-ing
Examples:
I am learning French for traveling to France.
This knife is for cutting meat.
In negative forms:
This knife is not for cutting meat.
I live for the moment, day by day, not for the past.
2.4. In case of + Noun / Gerund
“In case of” is used to indicate precaution or a possible future risk.
Structure: S + V + in case of + N / V-ing
Examples:
Fire brigades are standing by in case of an explosion.
Take an umbrella in case of raining.
3. Clauses and Phrases of Negative Purpose
Here are some expressions that show negative or preventive purposes:
Expression | Example |
|---|---|
for fear that + S + might + V | We spoke in whispers for fear that we might wake the baby. |
for fear of + N / V-ing | He avoided spicy food for fear of stomach problems. |
prevent + N + from + V-ing | We hope to prevent anything unpleasant from happening. |
avoid + V-ing | The workers wear masks to avoid inhaling the dust. |
lest + S + V | She turned away from the window lest anyone see them. |
for the purpose of + N / V-ing | A meeting was called for the purpose of appointing a new treasurer. |
with the intention of + V-ing | I went to the bank with the intention of getting some travelers cheques. |
4. Clause of Purpose Exercises in English
Exercise 1: Fill in the blanks with to, in order to, so as to, in order not to, so as not to, so that, for. Some sentences may have more than one correct answer.
Concentrate on your exercise __________ make any mistakes.
You have to wake up __________ arrive at school on time.
You have to register __________ participate in the forum.
She left work early __________ be at home when he arrives.
Ships carry lifeboats __________ the crew can escape if the ship sinks.
I will go to university __________ continue my studies.
He exercises regularly __________ be overweight.
__________ you can produce a good essay, you need to edit your writing.
She works hard __________ earn a living.
These men risk their lives __________ we can live more safely.
Exercise 2: Fill in the blanks with suitable purpose phrases: so that / for / in case of / in order to / so as not to
I went to the bank __________ talk to the bank manager.
They went to the pub __________ a drink.
She will save money __________ she can buy a new laptop.
I wrote down what he said __________ forget it.
__________ failing the exam, I have to study hard.
Exercise 3: Distinguish between in case / in case of and so that / in order that
Always carry an extra set of keys with you __________ you get locked out of your house.
__________ a power outage, use a flashlight to see in the dark.
She packed some snacks __________ we get hungry on the road.
__________ heavy rain, it is best to stay indoors.
The company developed a new app __________ improve user experience.
They studied late into the night __________ do well on the final exam.
He stayed up to finish the project __________ meet the deadline.
She attended the conference __________ network with industry experts.
Answer Key
Exercise 1
in order not to
so as to
to
so as to
so that
to
so as not to
in order to
to
so that
Exercise 2
in order to
for
so that
so as not to
in case of
Exercise 3
in case
in case of
in case
in case of
in order that
so that
so that
in order to
Master the Clause of Purpose with IDP
We hope this article helps you better understand how to use the Clause of Purpose in English. Although this grammar point may seem complex, practicing regularly will help you remember the structures and avoid common mistakes.
In addition to self-study materials, you can register for free IELTS mock tests at IDP to get familiar with the test format and learn how to manage your time effectively. At IDP, you can choose to take IELTS on computer based on your learning style and preferences.
When you are ready, register for the IELTS test with IDP today!