Conditionals: Zero, First, Second, Third, Mixed

Zero Conditional
If water reaches 100°C, it boils.
If you don't study, you don't pass.

For scientific facts, rules, habits.

First Conditional
If it rains tomorrow, we 'll cancel the trip.
If I finish work early, I 'll join you.

For realistic future possibilities.

Second Conditional
If I had more time, I would take up painting.
If the government invested more in public transport, cities would be less polluted.

For unlikely or imaginary situations in the present/future. This is the most important conditional for IELTS — it signals band 7+ in Speaking Part 3 and Writing Task 2.

Third Conditional
If I had studied harder, I would have passed the exam.
If the company had adapted sooner, it wouldn't have gone out of business.

For hypothetical past — things that didn't happen.

Mixed Conditional
If I had chosen a different career, I would be in a very different life now.
If the policy hadn't been introduced, the situation would be much worse today.

Past cause → present result. This is advanced grammar that distinguishes band 8 from band 7.

Examiners explicitly listen for a range of complex structures. In one Speaking Part 3 answer, using a second conditional:

"If we invested more in early-childhood education, we would see benefits that compound for decades."

demonstrates:

• Subjunctive forms
• Hypothetical reasoning
• Conditional syntax

All three raise the Grammatical Range score.

Mistake 1: "Will" in the if-clause > ❌ If I will have time, I will help you. > ✅ If I have time, I will help you.

Mistake 2: Mixing up second and third > ❌ If I would know, I would tell you. > ✅ If I knew, I would tell you.

Mistake 3: "Would" in both clauses > ❌ If governments would tax carbon, emissions would fall. > ✅ If governments taxed carbon, emissions would fall.

Mistake 4: Missing past perfect in third conditional > ❌ If I didn't miss the bus, I would have been on time. > ✅ If I hadn't missed the bus, I would have been on time.

Not every "if-clause" structure needs "if":

• Unless you train regularly, you won't improve. (= if you don't)
• Had I known, I would have told you. (= if I had known — very formal)
• Should you need help, please ask. (= if you need help)
• Provided that / As long as we act now, we can still limit the damage.

Using these variations pushes you into band 8 territory.

Complete each sentence with the correct conditional.

1. If I ___ (be) you, I would accept the offer.
2. If we ___ (plant) the trees last year, they would have grown by now.
3. Water ___ (freeze) if you leave it outside in winter.
4. If she ___ (take) the earlier train, she would be here now.
5. If the government ___ (introduce) the policy next month, many people ___ (lose) their jobs.

Answers:

1. were (second) •
2. had planted (third) •
3. freezes (zero) •
4. had taken (mixed: past cause → present result) •
5. introduces / will lose (first)