5 Online Exercises on English Conditional Sentences with Summary

Test the English conditional sentence with mixed exercises | Have you studied the conditional sentence in English but want to make sure you really understand how to use it?
 

Are you a bit confused by the difference between first, second, and third conditionals ? The best way to memorize if clauses, in this case, is to practice them with targeted exercises .

 And that's exactly what we're going to do today. In this article, you'll find a brief summary of the three main types of conditional sentences, followed by five exercises on the conditional clause in English, complete with solutions (which we urge you not to peek at!), designed to help you recognize and correctly use all forms: zero, first, second, and third conditionals. 

Whether you're a beginner, self-taught, or simply want to review for a big exam, test yourself with these exercises on the conditional clause in English!

Why You Should Practice English Conditional Sentences Online?

Doing online exercises on conditional sentences in English is one of the fastest and most effective ways to consolidate grammar and improve your fluency in real-world contexts that could actually arise in everyday life.

If clauses are essential for expressing conditions, possibilities, hypotheses, and consequences : things we tend to say every day, if you think about it. Knowing how to use them correctly can really make a difference in communication, both written and oral.

Being able to do all this online is a huge advantage: the exercises are immediate, often self-correcting, and you don't need paper or books. This means you can complete them wherever you are and whenever you want, making your studying more accessible and less tedious: it's the best way to learn flexibly, quickly, and effectively.

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English Conditional Sentence Exercises: Summary of the Rules

Before moving on to the exercises, let's quickly review the grammatical rules for the English conditional clause.

Remember, the conditional clause is divided into four types: zero, first, second, and third conditional.

Let's start with the zero conditional : we use it to express general truths or scientific facts. The structure to follow is as follows:

If + present simple, present simple.

Example : If you heat water to 100°C, it boils.

The first conditional , on the other hand, is used for real or possible future situations. Its structure is as follows:

If + present simple, will + base verb (infinitive without to)

Example : If it rains tomorrow, we will stay at home.

As for the second conditional, we use it to express unlikely hypotheses or imaginary situations in the present or future. The structure is as follows:

If + past simple, would + base verb

Example : If I had a car, I would drive to work. → If I had a house, I would drive home.

Then we have the third conditional, used to talk about hypothetical situations in the past that are now impossible to realize. In this case, we follow this structure:

If + past perfect, would have + past participle

Example : If she had studied, she would have passed the exam.

Finally, you may come across the mixed conditional, used to connect past events to consequences in the present or vice versa.

Example : If I had taken the job, I would be living in London now.

This diagram will help you recognize and construct sentences correctly , so you can approach the exercises with more confidence.

5 Mixed English Hypothetical Sentence Exercises with Translation

Now, all that's left to do is get to the heart of the lesson, dedicated to practical practice with if clauses! Test yourself with these five exercises on conditional sentences: for each, you'll find translated sentences and solutions to compare your answers.

-Exercise 1

Complete the sentences with the correct form of the verb in brackets to test your knowledge of the zero conditional.

  1. If you (heat) water to 100°C, it (boil) . → If you heat water to 100 degrees, it boils.
  2. If people (not eat) , they (get ) hungry.
  3. If you press this button, the light comes on.
  4. If children don't sleep enough, they 'll be tired at school.
  5. If you mix yellow and blue, you make green.

Solutions :

  1. If you heat water to 100°C, it boils .
  2. If people don't eat , they get hungry.
  3. If you press this button, the light comes on.
  4. If children don't sleep enough, they are tired at school.
  5. If you mix yellow and blue, you make green.

-Exercise 2

Complete the sentences using the First conditional, using the verbs in brackets.

  1. If it __________ (rain), we __________ (stay) at home. → If it rains, we will stay home.
  2. If I __________ (see) Sarah, I __________ (tell) her the news.
  3. If they __________ (not arrive) soon, we __________ (miss) the movie.
  4. If you __________ (study) hard, you __________ (pass) the exam. → If you study hard, you will pass the exam.
  5. If we __________ (not leave) now, we __________ (be) late.

Solutions:

  1. If it rains , we will stay at home.
  2. If I see Sarah, I will tell her the news.
  3. If they don't arrive soon, we will miss the movie.
  4. If you study hard, you will pass the exam.
  5. If we don't leave now, we will be late.

-Exercise 3

Complete the sentences by choosing between second or third conditional, remembering when to use one and when the other depending on the probability of the sentence.

  1. If I __________ (be) taller, I __________ (play) basketball professionally. → If I were taller, I could play basketball professionally.
  2. If she __________ (study) harder, she __________ (pass) the test. → If she had studied hard, she would have passed the exam,
  3. If we __________ (have) more money, we __________ (buy) a bigger house.
  4. If they __________ (not forget) the keys, they __________ (get in) earlier. → If they hadn't forgotten the keys, they would have arrived earlier.
  5. If I __________ (know) it was your birthday, I __________ (buy) you a gift.

Suggested solutions:

  1. If I were taller, I would play basketball professionally. → Second
  2. If she had studied harder, she would have passed the test. → Third
  3. If we had more money, we would buy a bigger house. → Second
  4. If they had not forgotten the keys, they would have gotten it earlier. → Third
  5. If I had known it was your birthday, I would have bought you a gift. → Third

-Exercise 4

Correct the errors in the following sentences with if clauses.

  1. If I will see her tomorrow, I'll tell her the news.
  2. If he studied more, he will pass the exam.
  3. If you would have called me, I would come.
  4. I would help you if I know how. → I would help you if I knew how.
  5. If we would live closer, we could meet more often.

Correct solutions:

  1. If I see her tomorrow, I will tell her the news. → First Conditional
  2. If he studies more, he will pass the exam. → First Conditional
  3. If you had called me, I would have come . → Third Conditional
  4. I would help you if I knew how. → Second Conditional
  5. If we lived closer, we could meet more often. → Second Conditional

-Exercise 5

As a final exercise, try translating the following sentences into English using the correct if clause. This exercise will help you put the rules you've learned into practice and reinforce the correct use of all conditional sentences.

  1. If you see him tonight, tell him to call me.
  2. If I were you, I wouldn't do it.
  3. If we hadn't missed the train, we would have arrived on time.
  4. If the sun comes out, we'll go to the park.
  5. If I had studied medicine, I would be a doctor now.
  6. If you touch that wire, you get an electric shock.
  7. If I won the lottery, I would move to Japan.
  8. If they had closed the window, there would have been no draft.
  9. If you help me, we'll finish sooner.
  10. If you do what you believe in, you are always right.

Suggested solutions:

  1. If you see him tonight, tell him to call me. → First conditional
  2. If I were you, I wouldn't do it. → Second conditional
  3. If we hadn't missed the train, we would have arrived on time. → Third conditional
  4. If the sun comes out, we'll go to the park. → First conditional
  5. If I had studied medicine, I would be a doctor now. → Mixed conditional (third + second)
  6. If you touch that wire, you get an electric shock. → Zero conditional
  7. If I won the lottery, I would move to Japan. → Second conditional
  8. If they had closed the window, there wouldn't have been a draft. → Third conditional
  9. If you help me, we'll finish sooner. → First conditional
  10. If you do what you believe in, you are always right. → Zero conditional

And here we are at the end of this lesson, entirely focused on practicing conditional sentences. How did it go? Practicing conditional sentences in English is essential for improving your language skills and communicating accurately about real, possible, or imaginary situations.

The various types of if clauses allow you to express different conditions, from a certain fact to a remote hypothesis, and practicing with practical exercises is the best way to consolidate these structures.

If you did well in these five exercises, then you can declare yourself understood and move on to the next lesson: we'll cover English modal verbs, with exercises, a worksheet, and a PDF!

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