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Conditionals Worksheet

Free printable exercises covering First, Second and Third Conditional: match the type, fill-in and write your own. Answer key included.

Level: B1–B2 3 Exercises Answer Key Included A4 Format

📖 Quick Grammar Reference: Conditional Sentences

TypeStructureUseExample
1st ConditionalIf + present simple, will + baseReal/likely futureIf it rains, I will stay home.
2nd ConditionalIf + past simple, would + baseImaginary present/futureIf I had wings, I would fly.
3rd ConditionalIf + past perfect, would have + ppImaginary pastIf she had studied, she would have passed.

Exercise 1 — Match the Conditional Type (Write 1st, 2nd, or 3rd next to each sentence.)

  1. If I win the lottery, I will buy a new house.   Type:
  2. If she had been more careful, she wouldn’t have made that mistake.   Type:
  3. If I were a bird, I would fly to a tropical island.   Type:
  4. If you call him, he will answer.   Type:
  5. If they had left earlier, they would have caught the train.   Type:

Exercise 2 — Fill in the Blank (Put the verbs in brackets in the correct form.)

  1. If it (not / rain) tomorrow, we will have a picnic.
  2. If I (be) you, I would apologise immediately.
  3. She would have got the job if she (prepare) better for the interview.
  4. If they (study) harder, they will pass the exam.
  5. He (travel) the world if he had more time.
  6. If she (not / take) that road, she would have arrived on time.
  7. What you do if you (find) a wallet in the street?
  8. If you heat water to 100°C, it (boil).

Exercise 3 — Write Your Own Conditional Sentences

  • First Conditional — a real possibility in the future

    Example: If I get a good mark, I will celebrate.

  • Second Conditional — an imaginary situation now

    Example: If I had more free time, I would learn to paint.

  • Third Conditional — an imaginary situation in the past

    Example: If I had known about the sale, I would have bought more.

📋 Show Answer Key

Exercise 1

  1. 1st Conditional (real future)
  2. 3rd Conditional (imaginary past)
  3. 2nd Conditional (imaginary present)
  4. 1st Conditional (real future)
  5. 3rd Conditional (imaginary past)

Exercise 2

  1. doesn’t rain
  2. were / was (both accepted in 2nd conditional)
  3. had prepared
  4. study
  5. would travel
  6. hadn’t taken
  7. would … found
  8. boils (Zero conditional — scientific fact)

Exercise 3

Open answers. Check: (1) First Conditional = if + present simple, will + base verb; (2) Second Conditional = if + past simple, would + base verb; (3) Third Conditional = if + past perfect, would have + past participle.

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Continue Practising Online

Test your conditionals knowledge with the LexFizz Quiz, or read the English conditionals guide on the blog.

Quiz Exercise → Conditionals Guide →

Conditionals Worksheet — FAQ

What conditionals does this worksheet cover?
This worksheet covers the three main conditional types: First Conditional (real/possible situations), Second Conditional (imaginary/unlikely present situations), and Third Conditional (imaginary past situations).
What level is this conditionals worksheet?
The worksheet is designed for B1–B2 learners. Exercises 1 and 2 are suitable for B1, while Exercise 3 (writing) challenges B2 learners to produce all three conditional types independently.
How is the First Conditional formed?
First Conditional uses: If + present simple, will + base verb. Example: If it rains tomorrow, I will stay at home. It describes real or likely future conditions.
How is the Second Conditional formed?
Second Conditional uses: If + past simple, would + base verb. Example: If I had more money, I would travel the world. It describes imaginary or unlikely present/future situations.
How is the Third Conditional formed?
Third Conditional uses: If + past perfect, would have + past participle. Example: If she had studied harder, she would have passed the exam. It describes imaginary situations in the past.
Can I save this worksheet as a PDF?
Yes. Click the orange ‘Print / Save as PDF’ button at the top of the page and select ‘Save as PDF’ in your browser’s print dialogue. The page is formatted for A4.
Is there a difference between ‘if’ and ‘when’ in conditionals?
Yes. ‘If’ suggests a condition that may or may not happen (If I see him...). ‘When’ implies the speaker is more certain the event will occur (When I see him...). This distinction is important at B2 level.
Does the worksheet include mixed conditionals?
No. This worksheet focuses on the three main types. Mixed conditionals (combining time frames) are a more advanced topic suitable for B2–C1 learners and will be covered in a future worksheet.
What online exercise is related to this worksheet?
The LexFizz Quiz exercise is ideal for practising conditional sentences with multiple choice questions. Visit lexfizz.com/exercises/quiz/ for interactive practice.
How long does this conditionals worksheet take?
Exercises 1 and 2 take approximately 15 minutes. Exercise 3 (writing your own conditional sentences) takes an additional 10–15 minutes depending on the learner’s level.