Study · Academic grammarModule 07
Conditionals and Hypothetical Language
Level B1–B2
Learning goals
- In this lesson, you will learn how conditional sentences describe facts, possible results, hypothetical situations and past alternatives. You will practise choosing the right verb forms and using conditional structures to explain academic ideas clearly.
Step 1 — Read and discover
Read the passage. Notice the bold conditional structures and think about whether each one describes a fact, a real possibility, an imagined situation or an alternative past outcome.
What if a city changes the way people travel?
A research team examined a transport project in a medium-sized city. The council introduced cheaper bus tickets and improved the frequency of services in three districts. The team wanted to know whether these changes affected travel habits.
If public transport is reliable, more people are likely to use it. During the first six months, bus journeys increased in two districts, although the change was smaller in the third. The researchers noted that if buses arrive on time, passengers can plan their journeys more easily. However, they warned that ticket prices were only one factor; the quality of the service also mattered.
The team then considered a hypothetical situation. If the council reduced parking spaces in the city centre, some drivers might switch to buses or bicycles. Others, however, could choose to visit less often. The researchers said that the outcome would depend on whether convenient alternatives were available.
They also reviewed an earlier decision. If the council had improved bus frequency before reducing fares, it might have attracted more passengers from the beginning. The available records could not prove this, because the two changes had been introduced at the same time.
The report concluded that transport policies should be evaluated carefully. Unless services are dependable, lower prices alone may not produce lasting change. The researchers recommended collecting data for a longer period and comparing districts with different transport needs.
Check your understanding
1. What did the council change in the three districts?Try again
1. What did the council change in the three districts?
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2. What might happen if parking spaces were reduced?Try again
2. What might happen if parking spaces were reduced?
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3. Why could the researchers not prove what would have happened if bus frequency had improved earlier?Try again
3. Why could the researchers not prove what would have happened if bus frequency had improved earlier?
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Step 2 — Understand the grammar
Conditional sentences connect a situation or condition with a result. The verb forms help readers understand whether the writer is describing a general fact, a real possibility, an imagined situation or an alternative to the past.
1. Zero conditional: general facts
Use if + present simple, present simple for facts, rules and results that are generally true: If water reaches 100°C at standard atmospheric pressure, it boils. The order of the clauses can change without changing the meaning.
2. First conditional: real future possibilities
Use if + present simple, will/can/may + base verb for a possible future situation and its likely result: If the sample remains stable, the team will repeat the test. Do not normally use will in the if-clause: If the sample remains stable, not If the sample will remain stable.
3. Second conditional: hypothetical present or future
Use if + past simple, would/could/might + base verb to discuss an imagined or unlikely situation: If the city built a new cycle route, more residents might cycle to work. The past form signals distance from reality, not necessarily past time. In formal writing, were is often used for all subjects in hypothetical clauses: If the plan were cheaper, it would be easier to fund.
4. Third conditional: alternative past outcomes
Use if + past perfect, would/could/might have + past participle to imagine a different past and its possible result: If the team had collected more data, it might have identified the pattern earlier. This structure does not change the past; it considers an alternative.
5. Unless and other conditional linkers
Unless means if not: Unless the equipment is checked, the results may be unreliable. Other useful linkers include provided that, as long as, and even if. Choose the linker that matches the intended relationship, and avoid using unless when the meaning is not negative.
6. Mixed conditionals
A mixed conditional connects different time periods. For example, if + past perfect can describe an unreal past condition with a present result: If the council had invested earlier, the network would be more efficient now. The time meaning must be clear from the context.
Grammar cards
zero conditional
grammar structureB1–B2Used for general facts, rules and relationships that are usually true.
“If water reaches its boiling point, it turns into vapour.”
- if + present simple, present simple
- general condition
first conditional
grammar structureB1–B2Used for a real or possible future situation and its likely result.
“If the sample remains stable, the team will repeat the test.”
- if + present simple, will + base verb
- possible future result
second conditional
grammar structureB1–B2Used to discuss an imagined, unlikely or unreal present or future situation.
“If the city built a cycle route, more residents might use it.”
- if + past simple, would + base verb
- hypothetical situation
third conditional
grammar structureB1–B2Used to imagine a different past condition and its possible past result.
“If the team had collected more data, it might have found the pattern.”
- if + past perfect
- would have + past participle
mixed conditional
grammar structureB1–B2Connects an unreal situation in one time period with a result in another.
“If the council had invested earlier, the network would be more efficient now.”
- past condition, present result
- if + past perfect
conditional clause
nounB1–B2A clause that expresses the condition under which something happens or is true.
“If the temperature rises, the device switches off.”
- if-clause
- conditional clause
main clause
nounB1–B2The clause that gives the result or main statement in a conditional sentence.
“In ‘If it rains, the event will move indoors’, the event will move indoors is the main clause.”
- main clause
- conditional sentence
unless
conjunctionB1–B2Means ‘if not’ and introduces a condition that must be avoided or met.
“Unless the figures are checked, errors may remain.”
- unless the data are checked
- unless otherwise stated
provided that
conjunctionB1–B2Means ‘only if’ or ‘on the condition that’.
“Participants may use the laboratory provided that they follow the safety rules.”
- provided that
- provided that the conditions are met
as long as
conjunctionB1–B2Introduces a condition that must be satisfied.
“The equipment can be borrowed as long as it is returned on time.”
- as long as
- as long as the rules are followed
even if
conjunctionB1–B2Introduces a condition that will not change the main result or decision.
“Even if the fee falls, some residents may continue to drive.”
- even if
- even if the cost is reduced
present simple in if-clauses
grammar patternB1–B2The present simple is normally used in an if-clause for a real future condition.
“If the survey receives enough responses, the team will publish the findings.”
- if + present simple
- real future condition
will in the main clause
grammar patternB1–B2Will can express a likely future result in a first conditional sentence.
“If the route opens on time, passenger numbers will increase.”
- will + base verb
- future result
would in hypothetical results
grammar patternB1–B2Would expresses an imagined result in a second conditional sentence.
“If parking were cheaper, more staff would drive.”
- would + base verb
- hypothetical result
could in conditionals
modal verbB1–B2Could expresses ability or a possible result in conditional sentences.
“If the sample were larger, the study could detect smaller differences.”
- could + base verb
- could have + past participle
might in conditionals
modal verbB1–B2Might expresses a possible but uncertain result.
“If the council reduced the fare, more people might use the bus.”
- might + base verb
- might have + past participle
past perfect in if-clauses
grammar patternB1–B2Had + past participle describes an unreal or alternative past condition in a third conditional.
“If the team had checked the figures, it would have noticed the error.”
- if + past perfect
- had + past participle
would have + past participle
grammar patternB1–B2Expresses an imagined result that did not happen in the past.
“If the team had started earlier, it would have finished on time.”
- would have + past participle
- unreal past result
were in hypothetical clauses
grammar patternB1–B2Were is often used with all subjects in formal hypothetical statements.
“If the proposal were more practical, the committee would consider it.”
- if I were
- if the proposal were
conditional inversion
grammar structureB1–B2In formal writing, had or should can sometimes begin a conditional clause without if.
“Had the council acted earlier, the delays might have been avoided.”
- Had the council acted
- Should further evidence emerge
Step 3 — Choose the correct meaning
Choose the best answer, then check your choices.
1. If the equipment is calibrated correctly, the readings are more reliable. This describesTry again
1. If the equipment is calibrated correctly, the readings are more reliable. This describes
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2. If the council lowered the fee, more people might join the programme. The writer is describingTry again
2. If the council lowered the fee, more people might join the programme. The writer is describing
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3. If the team had started earlier, it could have finished the survey on time. This refers toTry again
3. If the team had started earlier, it could have finished the survey on time. This refers to
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4. Unless the data are checked, errors may remain. This meansTry again
4. Unless the data are checked, errors may remain. This means
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5. If the city had invested in rail earlier, traffic would be lighter now. This is aTry again
5. If the city had invested in rail earlier, traffic would be lighter now. This is a
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Step 4 — Complete the sentences
Type the missing word or phrase. More than one answer may be accepted when it fits the sentence.
1.If the temperature (rise) above the limit, the device switches off.Try again✓
2.If the survey receives enough responses, the researchers publish the results next month. (will)Try again✓
3.If the route were safer, more people cycle to work. (might)Try again✓
4.If the team had checked the figures, it have noticed the error. (would)Try again✓
5.Unless the instructions clear, participants may make mistakes. (be)Try again✓
6.If the council had acted sooner, the system be more efficient now. (would)Try again✓
7.You can use the laboratory provided that you the safety rules. (follow)Try again✓
8.If the results had been recorded accurately, the comparison have been more useful. (could)Try again✓
Step 5 — Choose the correct form
Choose the best correction or answer.
1. If the sample (REMAIN) stable, the team will repeat the test.Try again
1. If the sample (REMAIN) stable, the team will repeat the test.
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2. If the university had provided more support, fewer students (WITHDRAW) from the course.Try again
2. If the university had provided more support, fewer students (WITHDRAW) from the course.
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3. If the plan were less expensive, it (BE) easier to approve.Try again
3. If the plan were less expensive, it (BE) easier to approve.
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4. Unless the results (CHECK), the report may contain errors.Try again
4. Unless the results (CHECK), the report may contain errors.
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5. If the council had improved the service earlier, more residents (USE) it now.Try again
5. If the council had improved the service earlier, more residents (USE) it now.
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Step 6 — Match the sentence beginnings and endings
Match each beginning with the best ending.
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2. ✓
3. ✓
4. ✓
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Step 7 — Quick review
Choose the best answer for each question.
1. Which sentence expresses a general fact?Try again
1. Which sentence expresses a general fact?
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2. Choose the correct first conditional sentence.Try again
2. Choose the correct first conditional sentence.
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3. Which phrase means “if not”?Try again
3. Which phrase means “if not”?
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4. Complete the sentence: “If I had saved the file, I __________ lost my work.”Try again
4. Complete the sentence: “If I had saved the file, I __________ lost my work.”
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5. “If the city had expanded the network earlier, travel would be easier now” is an example ofTry again
5. “If the city had expanded the network earlier, travel would be easier now” is an example of
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