First Conditional: Real Possibilities (Part 1 of 10)

What is the First Conditional?

The First Conditional helps us talk about real possibilities in the future – things that are both possible AND likely to happen. We use it to describe situations where one thing will happen if another thing happens first. The structure is: If + present simple, will + base verb.

First vs Zero Conditional

While Zero Conditional describes things that are always true (If I’m tired, I go to bed early), First Conditional describes specific situations that are likely to happen in a particular instance (If I’m tired this evening, I’ll go to bed early).

Main Uses

1. Warnings: If you don’t study, you’ll fail the exam.
2. Promises: If you help me move, I’ll buy you dinner.
3. Plans: If it rains tomorrow, we’ll go to the cinema.
4. Threats: If you break my phone, I’ll tell mom.
5. Negotiation: If you reduce the price, we’ll buy three instead of one.

Examples

If it rains tomorrow, I’ll take an umbrella.This is a likely possibility – we can check the weather forecast and plan accordingly.

If you don’t leave now, you’ll miss your train.This shows a warning about a real and immediate possibility.

If you finish your homework, we’ll go for ice cream.This demonstrates a promise based on a achievable condition.

Common Mistakes to Avoid

❌ Incorrect: If I will see her, I will tell her.

✅ Correct: If I see her, I’ll tell her.

Explanation: Never use ‘will’ in the if-clause; use present simple instead.

❌ Incorrect: If I win the lottery, I will buy a private island.

✅ Correct: If I won the lottery, I would buy a private island.

Explanation: Use Second Conditional for unlikely situations – winning the lottery is possible but unlikely.

Tips for Success

Always use present simple after ‘if’, never ‘will’
Only use First Conditional for things that are both possible AND likely
You can replace ‘will’ with ‘going to’ or other future forms if needed
If you’re describing something unlikely, use Second Conditional instead

Learning Path Notes