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Third Conditional Sentence: What It Is and How to Use It

by Edwin CañasWednesday, June 04 2025

Have you ever looked back and thought, "If only I had done things differently..."? That’s exactly what third conditional sentences help us express! 

In English grammar, these special sentence structures let us talk about past situations that didn’t happen, and imagine how things might have turned out. 

In this article, we will explore how it works, how to form it, and see plenty of relatable examples!

What is the Third Conditional Sentence?

image of two people using third conditional sentences

The third conditional is used to talk about hypothetical situations in the past-events that didn’t happen, but we imagine how things could have been different. 

It's perfect for expressing regret, missed opportunities, or alternative outcomes.

Structurally, the third conditional uses “if + past perfect” in the if-clause, and “would have + past participle” in the result clause. 

For example: If I had studied harder, I would have passed the exam

This sentence reflects on a real event (not passing the exam) and imagines a different result if the past had changed. 

How to Form Third Conditional Sentences

image of a mother consoling her daughter

Forming a third conditional sentence might sound complicated at first, but once you break it down, it’s actually pretty straightforward. 

A third conditional sentence talks about a past situation that didn’t happen and imagines a different outcome. The structure goes like this:

If + past perfect, subject + would have + past participle

Let’s look at an example before: If I had studied more, I would have passed the test.

In the first part (If I had studied more), we use the past perfect tense. In the second part (I would have passed the test), we use “would have + past participle”. 

This sentence imagines an alternative past outcome, perfect for expressing regrets or missed chances. 

You can also use could have, might have, or should have depending on the tone or meaning you want to convey.

Examples of Third Conditional Sentences

Once you understand the structure, it becomes easier to spot third conditional sentences.

Here are 10 examples that show how this type of conditional can be used in everyday situations:

  • If I had remembered your birthday, I would have sent a gift.
  • She would have joined us if she had finished work earlier.
  • If we had taken a different road, we wouldn’t have gotten lost.
  • They wouldn’t have argued if they had communicated better.
  • If he had studied architecture, he would have become an architect.
  • I might have traveled abroad if I had saved enough money.
  • If you had told me the truth, I wouldn’t have been upset.
  • We could have won the game if we had practiced more.
  • If the weather had been nice, we would have gone hiking.
  • She wouldn’t have missed her flight if she had left on time.

Also Read: 4 Types of Conditional Sentences

Conclusion

Now that you know how third conditional sentences work, you're ready to use them in real conversations and writing! 

Try writing your own third conditional sentences about things that could have happened in your life!

Improve your English skills with EZClass now! Also, check out the EZClass blog to discover more interesting articles.

And don't forget to share this article with your friends who are learning English!


 

Edwin Cañas

Edwin Cañas

Founder of EZClass

Edwin Cañas is an expert in e-learning, leadership, and educational technology. As COREnglish’s Director of Operations and founder of EZClass, he strives to make learning more engaging and accessible. He also co-authored the "How to Master Grammar for Beginners (Spanish Edition)" book to help Spanish learners master English with ease.

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