If Type 0

---

1. Form

The Zero Conditional is formed with:

If + Present Simple, Present Simple

Examples:

• If you heat water, it boils.
• If people don’t eat, they die.
• If you mix red and blue, you get purple.

---

2. When Do We Use It?

a) Scientific facts and natural laws

• If water reaches 100°C, it boils.
• If the sun sets, it gets dark.

b) General truths and habits

• If you don’t sleep well, you feel tired.
• If children are hungry, they cry.

c) Instructions and rules

• If the light is red, you stop.
• If students are late, the teacher marks them absent.

---

3. Signal Words

• if, when (sometimes when is used instead of if because the result is always true)

Examples:

• If you press this button, the computer turns on.
• When you heat ice, it melts.

---

4. Common Mistakes

---

5. Zero Conditional vs. First Conditional

• Zero Conditional: Facts, always true (100%).

  • If you heat ice, it melts.

• First Conditional: Future possibility (not 100% certain).

  • If it rains tomorrow, I will stay at home.

---

Quick Review

• Form: If + Present Simple, Present Simple.
• Use: Facts, scientific truths, habits, instructions.
• Signal Words: if, when.
• Don’t use “will” in Zero Conditional sentences.