Conditionals for argument and speculation
Conditionals are the grammar of argument: they let you predict consequences and propose solutions in Task 2, and speculate in Speaking Part 3. Master zero, first, second, third and mixed conditionals, alternatives such as unless and provided that, and formal patterns like 'were to' and inversion, without the tense errors examiners see most.
By the end of this lesson you will be able to:
- Form zero, first, second, third and mixed conditionals accurately, with no will or would in the if-clause
- Choose between first and second conditionals to show how likely you think an idea is
- Use unless, provided that, as long as, even if and in case with the correct meaning and tense
- Use formal patterns (were to, Should…, Had…) accurately and sparingly in Task 2
- Speculate in Speaking Part 3 by answering in the same conditional frame as the question
The conditional patterns
| Type | Form | Use | IELTS example |
|---|---|---|---|
Zero | If + present simple → present simple | Facts, general truths and processes: whenever A happens, B happens | If the temperature falls below 5°C, the heating system switches on. (Task 1 process) |
First | If + present simple → will / may / might / can + infinitive | Real future possibilities: realistic predictions, warnings and proposals | If the government raises fuel taxes, more commuters will switch to buses. (Task 2) |
Second | If + past simple (were) → would / could / might + infinitive | Imaginary present situations, and future ideas you see as hypothetical or unlikely | If university education were free, far more rural students would apply. (Task 2, Speaking Part 3) |
Third | If + past perfect → would / could / might have + past participle | The imaginary past: things that did not happen (regrets, criticism, lessons learned) | If I had started preparing earlier, I would have felt more confident on test day. (Speaking Part 2) |
Mixed: past → present | If + past perfect → would / could / might + infinitive | An unreal past condition with a result now | If the city had planned its drainage properly, the streets would not flood every monsoon. (Task 2) |
Mixed: present → past | If + past simple → would / could / might have + past participle | A present (permanent) situation that changed a past result | If I were more organised, I would have finished my essay in time. (Speaking) |
The golden rule: no will or would in the if-clause
In the if-clause, a present tense refers to the future and a past tense refers to an imaginary situation. Will and would belong in the main clause.
- ✗ If the government will build more flyovers, traffic will get worse. → ✓ If the government builds more flyovers, …
- ✗ If people would recycle more, … → ✓ If people recycled more, …
- ✗ If they would have invested earlier, … → ✓ If they had invested earlier, …
Comma or no comma?
- If-clause first → comma: If fuel prices rise, bus fares will increase.
- Main clause first → usually no comma: Bus fares will increase if fuel prices rise.
First or second? It depends on how real you think it is
Both sentences are correct, but they send different messages:
- If the government bans private cars in central Dhaka, air quality will improve. → a real possibility (perhaps the ban is being discussed).
- If the government banned private cars in central Dhaka, air quality would improve. → a hypothetical idea, either unlikely or proposed tentatively.
In Task 2, the second conditional suits proposals because it sounds measured: If schools taught financial literacy, young people would be less likely to fall into debt. The first conditional suits realistic warnings: If nothing is done, rising sea levels will displace millions of people in coastal districts.
Use modals to show how sure you are
Replace will/would with may, might or could to hedge. Hedging is a key feature of band 7+ academic style:
- If fares fall, more people may use the metro.
- If warnings had been issued earlier, the damage might have been less severe.
Beyond 'if': other ways to express a condition
| Expression | Meaning | IELTS example | Watch out |
|---|---|---|---|
unless | if … not / except if | Traffic will not improve unless public transport becomes more reliable. | 'Unless' already contains 'not': ✗ Unless you don't practise, you won't improve. → ✓ Unless you practise, … |
provided (that) / providing (that) | only if (a strict condition) | Online learning can be highly effective, provided that students have reliable internet access. | Formal and ideal for Task 2. Use a present tense after it for the future, not 'will'. |
as long as / so long as | only if | Part-time jobs benefit students as long as they do not interfere with their studies. | Slightly less formal than 'provided that' and very natural in Speaking. |
even if | whether or not: the result stays the same | Even if tuition were free, many rural families could not afford to send their children to a city university. | Don't confuse it with 'even though', which introduces a fact: Even though tuition is free, … |
in case | as a precaution, because something might happen | Families in coastal areas keep emergency supplies in case a cyclone strikes. | NOT the same as 'if': 'in case' means preparing beforehand, while 'if' means acting only when it happens. |
otherwise | if not (refers back to the previous idea) | Governments must invest in flood defences now; otherwise, future disasters will be far more costly. | 'Otherwise' is an adverb, not a conjunction, so put a semicolon or full stop before it, not just a comma. |
without / but for + noun | if there were no … / if there had been no … | Without remittances from workers abroad, many rural households would struggle to survive. | Followed by a noun, not a clause. 'But for' is very formal. |
suppose / supposing / imagine | let's imagine that … | Suppose private cars were banned from city centres: how would people get to work? | Useful in Speaking Part 3 to explore an idea. Use a past tense for an unreal situation. |
Check your understanding
8 questions- 1
Choose the correct sentence.
- 2
If more people (cycle) to work, Dhaka's air would be much cleaner.
- 3
If the embankment had been repaired in time, the village (not / flood).
- 4
Match each sentence with its meaning.
If you heat ice, it melts.If it rains tomorrow, the match will be cancelled.If I lived in Sylhet, I would visit the tea gardens every weekend.If I had studied harder, I would have passed.If I had accepted the job in Dubai, I would be rich now. - 5
The government is seriously discussing a ban on plastic packaging, and you think it will probably happen. Which sentence best expresses this?
- 6
Which sentence has the same meaning as 'If students don't receive feedback, they won't improve.'?
- 7
'Many families in coastal Khulna store dry food ___ a cyclone hits.' Which option fits best?
- 8
Online courses can be just as effective as classroom teaching, that learners are self-disciplined.
Answer every question to check.
Mixed conditionals: linking past and present
A mixed conditional combines half of a third conditional with half of a second.
Past condition → present result (the most common type): If + past perfect, would / could / might + infinitive
- If Bangladesh had not built the Padma Bridge, travellers from the south-west would still depend on slow ferry crossings.
- If I had chosen science at HSC level, I would be studying engineering now.
Present situation → past result: If + past simple, would / could / might have + past participle
- If I were better at managing my time, I would have finished the essay.
Tip: time words point you to the right form. Now, today and still signal a present result. Last year and in 2015 signal a past one.
Were for every person
In formal second conditionals, use were with I, he, she and it: If the government were more transparent, public trust would grow. If I was… is common in everyday speech and acceptable in Speaking, but use were in Writing. If I were you is a fixed phrase for giving advice.
Formal patterns: were to, should and inversion
| Standard form | Formal alternative | Meaning and use |
|---|---|---|
If governments raised taxes on sugary drinks, … | If governments were to raise taxes on sugary drinks, … / Were governments to raise taxes on sugary drinks, … | 'Were to' makes a future idea more hypothetical and is very natural in Task 2 proposals. The inverted form is more formal still. |
If the economy slows down, … | Should the economy slow down, … | 'Should' means 'if by chance' and goes with first-conditional results: Should the scheme fail, the government will face strong criticism. |
If the authorities had invested in drainage, … | Had the authorities invested in drainage, … | Third (or mixed) conditional: remove 'if' and move 'had' in front of the subject. |
If they had not acted quickly, … | Had they not acted quickly, … | In negative inversion, 'not' follows the subject and is never contracted: ✗ Hadn't they acted quickly, … |
If it were not for remittances, … | Were it not for remittances, … / Had it not been for remittances, … (past) | Formal ways of saying 'without'. Put a noun after 'for'. |
Question: Some people believe that public transport in cities should be free. To what extent do you agree?
If bus and metro fares were abolished in cities such as Dhaka, many commuters would abandon private cars and motorbikes, which would ease congestion and cut air pollution. Low-income workers, for whom fares can take a large share of their wages, would also benefit considerably. However, free travel will only succeed as long as the service remains reliable. If buses are overcrowded and trains run late, commuters will simply return to their cars, whatever the price. Should the government fail to fund extra capacity, a free system could even make overcrowding worse. Dhaka's experience shows why planning matters: if the city's metro had been built two decades earlier, congestion would not be so severe today. Free fares are therefore worth introducing, but only if they are combined with serious investment.
- were abolished … would abandonA second conditional (with a passive if-clause) for a hypothetical proposal: the writer is exploring an idea, not predicting a decision.
- as long as the service remainsA condition word followed by the present simple, not 'will remain'.
- If buses are … will simply returnA first conditional for a realistic warning.
- Should the government failAn inverted first conditional, and the only inversion in the paragraph. 'Could' in the main clause hedges the prediction.
- had been built … would not be … todayA mixed conditional: an unreal past condition with a present result, signalled by 'today'.
- A word of warningThis paragraph is deliberately dense for teaching. In a real essay, two or three conditionals per body paragraph is plenty.
Examiner: What would happen if people in your country stopped using cash completely?
Candidate: Well, I think it would actually suit a lot of people in Bangladesh, because mobile banking services like bKash are already everywhere. If everyone paid by phone, it**'d** probably be much harder to hide income, so the government might collect more tax. On the other hand, people in remote villages, where the network is weak, would struggle, unless coverage improved dramatically. So, personally, I'd say a cashless society is possible, but only as long as there's a reliable back-up.
Examiner: Looking back, could anything have been done differently?
Candidate: Definitely. If the government had invested in rural internet ten years ago, villagers wouldn't be so far behind today. And if people had been taught more about online fraud, fewer of them would have lost money to scams.
- would actually suitThe question uses 'would', so the answer stays in the same hypothetical frame. Matching the question's frame is the simplest way to stay accurate under pressure.
- If everyone paid … might collectA second conditional with 'might' for cautious speculation. Contractions such as it'd and wouldn't sound natural in speech.
- unless coverage improved'Unless' + past simple inside a hypothetical frame (not 'unless coverage improves').
- had invested … wouldn't be … todayA mixed conditional answers a question about the past and the present together.
- had been taught … would have lostA third conditional with a passive if-clause: a criticism of something that did not happen.
Task 2 solutions paragraph on 'brain drain': Band 6 vs Band 8
Band 6: one pattern repeated, with errors
If the government will give graduates better salaries, they will stay in Bangladesh. If they get good jobs, they will not go abroad. Also if universities improve, students will not need to study overseas. If the government does these things, then the brain drain will become less.
Band 8: varied conditionals chosen for meaning
If the government were to offer graduates competitive salaries and clear career paths, far fewer of them would feel compelled to emigrate. Admittedly, higher pay alone is not enough: unless research facilities improve, ambitious scientists will continue to look abroad. Strengthening local universities is also essential, provided that new funding is tied to measurable improvements in teaching and research. Had such reforms begun a decade ago, Bangladesh might not be losing so many of its brightest graduates today.
The band 6 version repeats one first-conditional pattern four times and makes the classic error 'If the government will give…'. The band 8 version chooses each structure for its meaning: 'were to' for a hypothetical proposal, 'unless' for a realistic warning, 'provided that' for a strict condition, and one inverted mixed conditional (past cause, present result). That is what the descriptors mean by using complex structures with flexibility.
Find and fix the conditional error
7 questions- 1
Find and correct the mistake:
If the government will increase the minimum wage, garment workers will have a better standard of living.
- 2
Find and correct the mistake:
If I would have known about the scholarship, I would have applied.
- 3
Find and correct the mistake:
If people recycled more, landfill sites will not fill up so quickly.
- 4
Find and correct the mistake:
Unless the government doesn't act quickly, the river will become even more polluted.
- 5
Find and correct the mistake:
Hadn't the factory owners improved safety standards, more workers would have been injured.
- 6
Find and correct the mistake:
If the city would have a better drainage system, the streets would not flood every monsoon.
- 7
Find and correct the mistake:
If we had left Dhaka earlier, we would of reached Cox's Bazar before dark.
Answer every question to check.
Speaking Part 3 practice
5 questions · up to 90s eachWhat would happen if everyone in your country worked from home?
Listen to the question, then record your answer.
Tips for a band 7+ answer
- • Match the question's frame: 'What would happen if…?' → would / could / might. 'What will happen if…?' or 'Do you think … will…?' → will / may / might.
- • Add a condition to your opinion to show range: '…as long as…', '…unless…', '…provided that…'.
- • For questions about the past, use a third or mixed conditional: 'If the government had built more shelters earlier, fewer families would have lost their homes.'
- • Use natural contractions (I'd, it'd, wouldn't, would've), but avoid inverted forms such as 'Had I…' or 'Should you…', which sound like written English.
Final quiz: conditionals
10 questions- 1
Put the parts in order to make one formal sentence.
Drag the cards (or use the arrows) into the correct order.
- 1the streets would not flood
- 2invested in drainage
- 3ten years ago,
- 4Had the city
- 5every monsoon.
- 2
Match each expression with its meaning.
unlessprovided thateven ifin caseotherwise - 3
Write ONE word to make a formal inverted conditional: governments fail to act, the consequences for coastal communities will be severe.
- 4
If the factory (follow) the safety rules, the fire would not have spread so quickly.
- 5
Which sentence describes a PAST decision that affects the speaker's situation NOW?
- 6
The examiner asks: 'What would happen if cars were banned from city centres?' Which answer is the most accurate and natural?
- 7
Find and correct the mistake:
Even though tuition were free, many poor students could not afford to live in the city.
- 8
Find and correct the mistake:
If it will rain heavily tonight, the roads in Chattogram will flood.
- 9
Choose TWO correct sentences.
Select 2.
- 10
If I you, I would start preparing for IELTS at least three months before the test.
Answer every question to check.
Key takeaways
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