Conditional Sentences

Conditional Sentences

1️⃣ Open (Present or Future) Conditional

Used to express real possibilities in the present or future.

Structure:

If + present simple, will/shall + base form of verb

Examples:

• If he works hard, he will succeed.
• He will succeed if he works hard. (Main clause can come first.)

❌ If it will rain tonight, we will cancel the match.

✅ If it rains tonight, we will cancel the match.

2️⃣ Unreal Present or Future Conditional

Used to talk about hypothetical or unreal situations in the present or future.

Structure:

If + past simple, would + base form of verb

Examples:

• If I had a lot of money, I would buy a car.
• If you invited me, I would be happy.

Notes:

• We often use were instead of was after “if”:
• If I were rich, I would help you.
• Inversion (formal/literary style) is possible by omitting “if”:
• Were I rich, I would help you.

❌ If he live near the office, he would walk to work.

✅ If he lived near the office, he would walk to work.

❌ If he was leader, the team would perform better.

✅ If he were the leader, the team would perform better.

3️⃣ Unreal Past Conditional

Used to talk about hypothetical situations in the past, often expressing regret or criticism.

Structure:

If + past perfect, would/might/could + have + past participle

Examples:

• If you had studied hard, you would have passed the exam.
• If he had taken the exam, he might have passed it.

Inversion:

• Had you studied hard, you would have passed the exam. (Omit “if” for formal style.)

❌ If they have left earlier, they would have caught the train.

✅ If they had left earlier, they would have caught the train.

❌ Has he listened to the teacher, he would not have made that mistake.

✅ Had he listened to the teacher, he would not have made that mistake.

4️⃣ Zero Conditional

Used to express general truths, scientific facts, or situations that are always true.

Structure:

If + present simple, present simple

Examples:

• If it rains, the insects come out.
• If you heat water to 100°C, it boils.

❌ If people eat too much sugar, they will gain weight.

✅ If people eat too much sugar, they gain weight.