First Conditional

First Conditional

The First Conditional is used to talk about real or possible situations in the future and their likely results.

It describes something that may happen if a certain condition is met.

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Structure

If + Present Simple, will + Base Verb

or

Will + Base Verb + if + Present Simple

Both structures have the same meaning.

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Examples

• If it rains, I will stay at home.
• If you study hard, you will pass the exam.
• If we leave now, we will catch the train.
• She will be happy if you help her.

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When to Use the First Conditional

Use the First Conditional to talk about:

1. Future Possibilities

• If it rains tomorrow, we will cancel the picnic.
• If I have enough money, I will buy a new laptop.

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2. Plans and Decisions

• If I finish work early, I will visit my grandparents.
• We will go to the beach if the weather is nice.

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3. Warnings

• If you don't wear a helmet, you will get hurt.
• If you drive too fast, you will have an accident.

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4. Promises and Offers

• If you need help, I will help you.
• If you call me, I will answer.

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Formula

If-Clause

If + Subject + Present Simple

Main Clause

Subject + will + Base Verb

Examples

• If she studies, she will succeed.
• If they arrive early, we will start the meeting.

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Modal Verbs in the Main Clause

Instead of will, other modal verbs can sometimes be used.

Examples

• If you finish early, you can go home.
• If you study hard, you may pass.
• If you want to succeed, you should work harder.

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Negative Sentences

Examples

• If you don't hurry, you will miss the bus.
• If he doesn't study, he won't pass the exam.
• If we don't leave now, we won't arrive on time.

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Questions

Examples

• What will you do if it rains?
• Will you come if I invite you?
• If she calls, will you answer?

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First Conditional vs Zero Conditional

Zero Conditional	First Conditional
General truths and facts	Real future possibilities
Present Simple + Present Simple	Present Simple + will + Verb

Examples

Zero Conditional

If you heat water, it boils.

First Conditional

If you heat the water, it will boil.

The first sentence expresses a general truth. The second sentence refers to a future situation.

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First Conditional vs Second Conditional

First Conditional	Second Conditional
Real or likely future situations	Unreal or imaginary situations
If + Present Simple	If + Past Simple
Will + Verb	Would + Verb

Examples

First Conditional

If I have time, I will visit you.

Second Conditional

If I had time, I would visit you.

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Important Rules

• Use the Present Simple after if.
• Do not use will in the if-clause.
• Use will + base verb in the main clause.
• Use a comma when the sentence starts with if.

Correct

• If you study, you will pass.

Correct

• You will pass if you study.

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Common Mistakes

❌ If it will rain, we will stay home.

✅ If it rains, we will stay home.

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❌ If you will study, you will pass.

✅ If you study, you will pass.

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❌ If she comes, she passes.

✅ If she comes, she will pass.

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Quick Quiz

1. Which sentence is a First Conditional?

A. If water reaches 100°C, it boils.

B. If I had money, I would travel.

C. If it rains, I will stay home.

D. If she had studied, she would have passed.

Answer: C

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2. Which structure is correct?

A. If + Present Simple, will + Verb

B. If + Will, Present Simple

C. If + Past Simple, Would + Verb

D. If + Present Perfect, Will + Verb

Answer: A

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3. Which sentence is correct?

A. If he will come, I will help him.

B. If he comes, I will help him.

C. If he came, I will help him.

D. If he come, I will help him.

Answer: B

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4. Complete the sentence.

If you ______ hard, you will pass the exam.

A. studied

B. study

C. will study

D. studying

Answer: B

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Summary

• The First Conditional talks about real or possible future situations.
• Structure:
  • If + Present Simple, will + Base Verb
  • Will + Base Verb + if + Present Simple
• Do not use will after if.
• Use the First Conditional for predictions, plans, warnings, promises, and future possibilities.

Related Lessons

• Conditionals
• Zero Conditional
• Second Conditional
• Third Conditional
• Mixed Conditionals
• If Clauses
• Present Simple Tense
• Future Simple Tense