First and Second Conditionals

What Are Conditionals?

Conditional sentences use "if" to describe what happens when a certain condition is met. They have two parts:

1. The IF clause (the condition)
2. The main clause (the result)

English has several types of conditionals. At the B1 level, you need to master the first and second conditionals.

First Conditional: Real Possibilities

The first conditional talks about things that are possible or likely to happen in the future.

Structure

If + present simple, ... will + base verb

Key Points

• The IF clause uses the present simple (NOT "will").
• The main clause uses will + base verb.
• You can switch the order: "I will stay at home if it rains." (No comma when the if clause comes second.)

Examples

1. If I have time, I will call you tonight.
2. If the weather is nice, we will go to the beach.
3. You will get a good job if you learn English well.
4. If she doesn't answer, I will leave a message.
5. What will you do if you don't get the job?

Variations

You can use may, might, can instead of "will" to show less certainty:

• If it rains, we might cancel the picnic. (less certain)
• If you finish early, you can leave. (permission)

Second Conditional: Unreal / Imaginary Situations

The second conditional talks about situations that are imaginary, unlikely, or impossible right now.

Structure

If + past simple, ... would + base verb

Key Points

• The IF clause uses the past simple — but it does NOT refer to the past! It describes an imaginary present or future.
• The main clause uses would + base verb.
• For "to be," we traditionally use "were" for all subjects (especially in formal English): "If I were rich..." / "If she were here..."

Examples

1. If I won the lottery, I would travel around the world.
2. If I could fly, I would visit every country.
3. If she lived closer, we would see each other more often.
4. What would you do if you had more free time?
5. If I were president, I would change the education system.

Giving Advice with Second Conditional

The phrase "If I were you, I would..." is a very common way to give advice:

• If I were you, I would apologize to her.
• If I were you, I wouldn't worry about it.

First vs. Second Conditional: What's the Difference?

The difference is about how likely the situation is:

Example Sentences

1. If you don't leave now, you will be late. (first — real possibility)
2. If I knew the answer, I would tell you. (second — I don't know the answer)
3. If he calls, will you answer? (first — he might call)
4. If I could speak perfect English, I would work in London. (second — imaginary)
5. If we save enough money, we will go to Japan next year. (first — real plan)
6. If I were taller, I would play basketball. (second — I'm not tall)

Common Mistakes

Mistake 1: Using "will" in the IF clause

• Wrong: If I will have time, I will call you.
• Correct: If I have time, I will call you.

Mistake 2: Using "would" in the IF clause of second conditional

• Wrong: If I would be rich, I would buy a car.
• Correct: If I were rich, I would buy a car.

Mistake 3: Mixing up first and second conditional

• "If I win the lottery..." (first conditional — I'm buying a ticket, it's possible)
• "If I won the lottery..." (second conditional — I'm just dreaming)

Mistake 4: Using "was" instead of "were"

• Informal: "If I was rich..." (common in speech)
• Formal/correct: "If I were rich..." (preferred in writing and exams)

Practice Tips

1. Dream big with second conditional: Write five sentences starting with "If I had..." or "If I could..."
2. Make plans with first conditional: "If the weather is good this weekend, I will..."
3. Give advice: Practice "If I were you, I would..." with common situations.
4. Ask each other: Play a game with a friend — take turns asking "What would you do if...?" questions.