Conjunctions of Condition 

In this lesson, master conjunctions of condition to connect clauses showing conditions using combinations like "if," "unless," and "provided that." Clear explanations and practice exercises to help you learn.

What Are Conjunctions of Condition in English?

What Are Conjunctions of Condition?

Conjunctions of condition are used to express a condition or contingency that must be met for something to happen or be true. They are words that connect two clauses or phrases to indicate that one is dependent on the other.

Common Conjunctions of Condition

The following list presents some of the conjunctions that can be used to form conditional sentences:

Here are a few examples using these conjunctions:

Example

If they hold the party without me, I am going to get angry.

He was going to ditch us unless we told him the truth.

Once you learn it, you will love it for the rest of your life.

If

The conjunction 'if' is used to introduce a clause that expresses a condition or contingency that must be met for something to happen or be true. It is commonly used in the zero, first, second, third, and mixed conditionals. Here are a few examples:

Example

If you were here, they wouldn't hurt me.

If Marco comes, I will stay for dinner.

Unless

Unless is used to indicate that something will not happen if something else does not happen. In other words, 'unless' means 'if not'. Here are a few examples:

Example

He won't go to sleep unless you tell him a story.

Unless you call Alex, he won't leave the house.

Once

The conjunction 'once' usually means 'as soon as', but in some contexts, it can also mean the same as 'if'. In general, 'once' is used to indicate that something will happen immediately after a certain condition is met. For example:

Example

Once you get to know him, he will seem really interesting.

Once he becomes angry, no one can control him.

Phrases That Indicate Conditions

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There are some phrases that can act as conjunctions to link two clauses, where one of the clauses expresses a condition. Here are the phrases:

In case

As long as/so long as

Provided (that)

Only if

If only

In Case

'In case' is used to express the possibility that something might happen, and to prepare for that possibility by taking action or making a plan. It can also be used to express a condition or contingency that must be met in order for something to happen or be true. Here are a few examples:

Example

Keep the blanket, in case it gets cold at night.

In case he calls, tell him that his mother is ok now.

As Long As, So Long As

'As long as' and 'so long as' have the same meaning. They are both used to introduce a clause that expresses a condition and can mean 'provided that'. Check out the examples:

Example

As long as you behave, they will keep you in their house.

She would take care of the kids so long as you pay her.

Provided (that)

The conjunction 'provided' is sometimes followed by the word 'that'. Together, they are used to introduce a clause that expresses a condition, and can mean 'in a condition that', 'if', or 'only if'.
Check out a few examples:

Example

You can stay here, provided that your mother is ok with it.

The doctor will help, provided that he is not pretending to be sick.

Only If

Only if has the same meaning as provided that. It means 'in a condition that'. Here are a few examples:

Example

Maria will talk to him, only if it benefits her.

Only if you read more about history, you can understand that it repeats over and over.

If Only

If only is used to express a hypothetical or wishful condition in which something unpleasant could be avoided or changed. Check out these examples for more clarification:

Example

If only she had paid more money, we could have been sure that the products are original.

I would do whatever I could if only she asked me.

Inversion

We can form conditional sentences without 'if' by using an inverted past subjunctive clause which marks the condition, followed by the main clause which expresses the consequence. This makes the sentence more formal. Pay attention to the examples:

Example

Had I known you better, I would never have punched you in the face in the first place. → If I had known you better, I would never have punched you in the face in the first place.

Were I you, I would take the job offer. → If I were you, I would take the job offer.

Review

Conjunctions of condition are used to express a particular condition for something else to happen. They can be single words or phrases that can link two clauses. Here are conditional conjunctions.

If

Unless

Once

In case

As long as/so long as

Provided (that)

Only if

If only

Quiz:


1.

Which of the following sentences correctly uses a conjunction of condition?

A

She smiled as she opened the gift.

B

She will come to the party if she finishes work early.

C

We watched the movie while eating dinner.

D

Even though it's raining, they are playing outside.

2.

Which sentence uses "unless" correctly?

A

We'll cancel the picnic unless the weather forecast predicts rain.

B

She'll join the team unless she passes the interview.

C

Unless you finish your homework, you cannot watch TV.

D

He smiles unless he is in a good mood.

3.

Sort the words to form a correct sentence.

you
we
avoided
,
could
listened
only
if
this
crisis
had
.
have
4.

Match each sentence to the conjunction use.

Only if you apologize will she forgive you.
As long as you drive safely, you can borrow the car.
If only we had left earlier, we wouldn't have missed the flight!
If temperatures drop below zero, the pipes may freeze.
Requirement-based permission
General condition
Hypothetical wish about the past
Emphatic/exclusive condition
5.

Complete each sentence using the correct conjunction of condition.

Bring a power bank

your phone battery runs low during the trip.

you finish your assignment by 5 PM, we can go to the cinema.

she invites me personally, I won't attend the wedding.

I had known about the traffic, I would have taken a different route!

in case
if
unless
if only

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