First Conditional

First Conditional

The First Conditional is used to talk about real and possible situations in the future. The speaker believes the condition is genuinely possible — it might actually happen.

We form the First Conditional with If + Simple Present in the if-clause and will + infinitive in the main clause. Other modal verbs such as can, may, and might can also be used in the main clause to express different degrees of certainty.

Quick Example

• If it rains, I will take an umbrella.
• If she studies hard, she will pass the exam.
• If you don’t hurry, you will miss the bus.
• If they arrive early, we will start the meeting.

Form

Note: The main clause can also use can, may, or might instead of will: If it rains, we might stay home.

Common Signal Words

• If
• Unless
• As long as
• Provided that
• In case
• When (future)

Use

The First Conditional is used to express:

1. Real and Possible Future Situations
2. Warnings and Threats
3. Promises and Offers

1. Real and Possible Future Situations

Use the First Conditional to talk about future situations the speaker considers genuinely possible.

• If the weather is nice, we will go to the beach.
• If you study hard, you will get a good grade.
• If she calls me, I will answer.
• If they finish early, they will join us for dinner.
• If I save enough money, I will travel to Japan.

2. Warnings and Threats

Use the First Conditional to warn someone about a possible negative consequence.

• If you don’t wear a coat, you will get cold.
• If he drives so fast, he will have an accident.
• If you don’t pay the bill, they will cut off the electricity.
• Unless you apologize, she won’t forgive you.

3. Promises and Offers

Use the First Conditional to make promises or offers that depend on a condition.

• If you help me, I will help you too.
• If you need anything, I will be there for you.
• If you come to the party, I will introduce you to everyone.
• If you are tired, I will drive you home.

Examples

Conclusion

The First Conditional expresses real possibilities — situations the speaker genuinely thinks could happen. The key difference from the Zero Conditional is that the First Conditional talks about specific future situations, while the Zero Conditional expresses timeless facts.

Always remember: the if-clause uses the Simple Present (never “will”), while the main clause uses will + infinitive. A common mistake is to write “If it will rain…” — this is incorrect in English.

Vocabulary Quiz + Pronunciation

Vocabulary Quiz + Pronunciation