Grammar
Conditionals
How do English conditionals work?
English conditionals connect a condition with a result, showing whether the situation is certain, realistic, or imagined. Use the present simple in both clauses for general truths; use the present simple plus will in the result for realistic futures, and past simple plus would for hypothetical situations. If the alarm rings, the guard will check the entrance.
Key points
- A conditional sentence has a condition and a result.
- General truths use the present simple in both clauses.
- Real future possibilities use present simple and will.
- Hypothetical situations use past simple and would.
This lesson has 5 stages. You can stop at any time and continue later.
At a glance
| Form | Use it for | Example |
|---|---|---|
| Present simple + present simple | General truths, rules, and automatic results | If ice melts, water forms. |
| Present simple + will | Realistic future possibilities | If Maya calls, I will answer. |
| Past simple + would | Imagined or unlikely present situations | If I had time, I would volunteer. |
Stage 1 of 5
Understand
What it means, when to use it, and mistakes to avoid.
The full explanation
A conditional sentence connects a condition with a result. English uses distinct verb combinations to show how the speaker views the relationship between these two clauses: as a universal constant, an actionable future possibility, an imagined present alternative, or a missed past opportunity.
If the client signs the contract today, we will begin construction on Monday.
Why it works: The signing is a realistic future possibility, so the condition uses the present simple 'signs' and the result uses 'will begin'.
2 more examples
-
If I worked from home on Fridays, I would spend less money on commuting.
The speaker imagines a change to their current working schedule, so the sentence uses the past simple 'worked' and 'would spend'.
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If you press the emergency button, the conveyor belt stops immediately.
Both clauses take the present simple because this sentence states an automatic mechanical rule.
Read the full guide
Separate the condition from its result
Every conditional sentence connects two distinct elements: an event that must happen first, and the consequence that follows. The event that triggers the action is the condition, usually introduced by the word if. The consequence is the result clause, which describes what happens once that condition is met. Identifying which part depends on which helps you select the correct verb forms. When you analyze a sentence, isolate the trigger before you worry about tenses.
-
If the temperature drops below freezing, maintenance inspects the water pipes.
Why it works: The freezing temperature is the triggering condition, and the pipe inspection is the dependent result.
-
The team will release the update if testing finishes on Friday.
Why it works: The update depends entirely on testing completion, even though the result clause appears first.
Your turn
Which part of the sentence 'If the bus arrives on time, we will reach the theater before seven' is the condition?
Answer: If the bus arrives on time
Show the answer
Answer: If the bus arrives on time
The clause starting with 'If' contains the triggering event that must occur for the result to happen.
Express automatic results and scientific truths
When a result happens automatically every time the condition occurs, use the present simple tense in both clauses. This pattern, often called the zero conditional, describes universal truths, scientific facts, company rules, and consistent personal habits. Because the outcome is certain and timeless rather than tied to a single future moment, you do not use modal verbs like will. The connection between cause and effect remains steady regardless of the day or speaker.
-
If office workers sit for long hours without moving, their posture suffers.
Why it works: Both clauses use the present simple because this statement describes an established physical fact.
-
When water reaches one hundred degrees Celsius, it boils.
Why it works: Using 'when' in place of 'if' confirms that this outcome is a constant physical certainty.
You can practise this again in Live up to and Run out of.
Your turn
Which sentence correctly expresses an established workplace policy as a general truth?
Answer: If an employee loses their security badge, building security issues a temporary pass.
Show the answer
Answer: If an employee loses their security badge, building security issues a temporary pass.
General policies and routine facts require the present simple in both clauses, without 'will' or past forms.
Talk about realistic future possibilities
To discuss a realistic possibility in the future, pair a present simple verb in the condition with will plus a base verb in the result. English speakers do not place will inside the if-clause, even when referring to an event that has not happened yet. The present verb establishes the potential scenario, while will announces the outcome you expect. This pattern is standard for professional promises, scheduling agreements, and daily logistics.
-
If the courier delivers the package this afternoon, I will assemble the equipment.
Why it works: The delivery is a realistic possibility, so the condition uses 'delivers' and the result uses 'will assemble'.
-
We will book the conference tickets if management approves the travel budget.
Why it works: The result clause with 'will book' precedes the condition, which keeps the present simple 'approves'.
Your turn
Choose the sentence that correctly follows the rule for real future possibilities.
Answer: If our flight lands early, we will call hotel reception.
Show the answer
Answer: If our flight lands early, we will call hotel reception.
The if-clause requires the present simple 'lands' rather than 'will land' or the past 'landed'.
Describe hypothetical present and future situations
When you describe a situation that is contrary to present reality or improbable in the future, use a past form in the condition and would plus a base verb in the result. The past tense here does not indicate past time. Instead, it signals psychological distance from reality, showing that the event is merely imagined. In formal English, speakers prefer were instead of was for all subjects in the condition.
-
If I owned an electric vehicle, I would charge it overnight in my garage.
Why it works: The speaker does not currently own an electric car, so the past verb 'owned' indicates an imagined present.
-
She would speak to the property landlord directly if she were in town.
Why it works: The form 'were' marks an unreal present condition, followed by 'would speak' in the result.
Your turn
Which sentence correctly portrays an unreal present condition?
Answer: If he lived closer to downtown, he would walk to work every morning.
Show the answer
Answer: If he lived closer to downtown, he would walk to work every morning.
An imagined present requires the past simple 'lived' in the condition and 'would walk' in the result.
Choose between real and imagined verb patterns
The choice between a first and second conditional often depends on how the speaker perceives the likelihood of an event, rather than the topic itself. If an event seems probable or actionable, use the present tense with will. If the same event seems remote, unrealistic, or playful, shift to the past tense with would. Selecting the verb pattern tells your listener whether you view the condition as an actionable plan or purely theoretical speculation.
-
If I find your house keys, I will bring them to your office.
Why it works: The speaker considers finding the keys a genuine possibility during their search.
-
If I found a bag of diamonds on the sidewalk, I would surrender it to the police.
Why it works: Finding diamonds on the sidewalk is extremely improbable, so the speaker treats it as an imagined scenario.
Your turn
What does the sentence 'If we moved to Sydney, we would rent an apartment near the harbor' signal about the move?
Answer: The speaker considers the relocation an imagined or unlikely scenario right now.
Show the answer
Answer: The speaker considers the relocation an imagined or unlikely scenario right now.
The past form 'moved' combined with 'would rent' shows that the relocation is hypothetical rather than a planned fact.
Change result certainty using modal auxiliaries
While will and would remain the most common result verbs, modal auxiliaries such as can, could, may, and might allow you to adjust how certain or permitted the outcome is. Using might or could in place of will or would lowers your certainty, turning a definite promise into a cautious possibility. Using can or could highlights ability or opportunity rather than an automatic result. Choosing the right modal refines your tone in workplace conversations.
-
If the rain stops before three o'clock, we might play tennis in the park.
Why it works: 'Might' expresses possibility rather than a firm commitment, making the plan tentative.
-
If our department had extra budget, we could hire an outside translator.
Why it works: 'Could' indicates hypothetical capability in an imagined situation rather than a guaranteed outcome.
Your turn
Which modal verb should you choose if you want to express a tentative possibility rather than a definite outcome?
Answer: might
Show the answer
Answer: might
'Might' softens the result to a tentative possibility, whereas 'will' promises a definite consequence.
Place clauses in natural order and punctuate correctly
You can position the condition either at the start of the sentence or at the end without changing its core factual meaning. However, the order dictates the punctuation. When the sentence opens with the if-clause, insert a comma directly before the result clause to give the reader a clean boundary. When the result clause leads the sentence, omit the comma because the connecting word if provides sufficient structural separation between the two thoughts.
-
If you submit your expense claims before Friday, accounting processes them next week.
Why it works: A comma separates the introductory if-clause from the main result clause.
-
Accounting processes your expense claims next week if you submit them before Friday.
Why it works: No comma appears when the main result clause precedes the condition.
Your turn
Which sentence displays the correct punctuation for clause order?
Answer: If you need additional packing supplies, ask the front desk clerk.
Show the answer
Answer: If you need additional packing supplies, ask the front desk clerk.
An introductory if-clause must be followed by a comma before the main clause begins.
Recognize reduced modal forms in spoken conversation
In natural conversation, native speakers routinely contract will to 'll and would to 'd, blending them directly onto subject pronouns. These contractions sound very subtle, reducing to a quick /l/ or /d/ sound that can easily slip past an untrained ear. Recognizing these reduced forms helps you distinguish whether a speaker is stating a practical plan or merely daydreaming about an unreal possibility. Train your listening to focus on the pronoun endings.
-
If they invite us to the workshop, we'll confirm our attendance right away.
Why it works: The pronoun and modal blend into 'we'll' (/wiːl/), signaling a realistic first conditional plan.
-
If I lived closer to the facility, I'd cycle to work every morning.
Why it works: The contraction 'I'd' (/aɪd/) indicates 'I would', confirming an imagined second conditional scenario.
Your turn
In the spoken sentence 'If they asked for volunteers, I'd offer to help,' what does 'I'd' represent?
Answer: I would
Show the answer
Answer: I would
In this hypothetical second conditional sentence, 'I'd' is the contracted form of 'I would' paired with the base verb 'offer'.
Common mistakes
What learners often say, what to say instead, and why.
-
Not this:
If the supplier will deliver today, we will start work.Say: If the supplier delivers today, we will start work.
Use the present simple in the if-clause, and keep will in the result clause.
-
Not this:
If the lights will flash, the machine stops.Say: If the lights flash, the machine stops.
Automatic results use the present simple in both clauses.
-
Not this:
If I owned a larger flat I would invite everyone.Say: If I owned a larger flat, I would invite everyone.
Use a comma when the if-clause comes first.
Use it naturally
How people really use “Conditionals”
Neutral Fine almost anywhere, at work or with friends.
Words it often goes with
- conditional sentenceA conditional sentence connects a condition with a result.
- likely conditionUse the first conditional to talk about a likely condition and its future result.
- imagined conditionAn imagined condition can describe a situation that is different from your life now.
Questions about "Conditionals"
Can I use 'will' in the clause that starts with 'if'?
In standard first conditional sentences, avoid using 'will' immediately after 'if'. The if-clause sets the condition using the present simple tense, even though the meaning refers to future time. Save 'will' for the result clause that explains the consequence. Using 'will' in both clauses sounds repetitive to native listeners and confuses the timeline.
If the train arrives on time, we will catch our flight.
If you submit the report today, management will review it tomorrow.
Should I say 'If I was' or 'If I were' in imagined situations?
Both forms appear in everyday English, but 'If I were' is traditional and widely preferred in formal writing, examinations, and professional speech. It signals immediately that the speaker is imagining an unreal condition rather than describing an actual past event. In casual conversation, many native speakers say 'If I was', but choosing 'were' remains the safest choice in work settings.
If I were the department manager, I would hire two technical writers.
If she were available, she would lead the customer presentation.
When is a comma necessary between the two clauses?
Use a comma when the if-clause begins the sentence. The comma provides a visual break that separates the condition from its outcome. If you reverse the order and put the result clause first, omit the comma because the word 'if' already serves as the connector between the two thoughts.
If our client signs the contract, we will begin production.
We will begin production if our client signs the contract.
Does the second conditional always describe something completely impossible?
No, it describes situations that the speaker views as remote, unlikely, or purely hypothetical at the present moment. While some second conditionals describe pure fantasies, others express realistic options that simply have a low probability. The grammatical form indicates your perspective on how probable the event feels.
If we won the company raffle, we would donate the prize.
If I owned a car, I would drive to work during rainy weeks.
Before you go
Remember this
Identify the condition, determine whether the situation is real or imagined, and apply the corresponding verb formula. Keep will and would in the result clause, and use a comma only when the if-clause opens the sentence.
Stage 2 of 5
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Read the transcript
If our team arrives early, we can review the notes.
This first conditional sentence uses the present simple 'arrives' in the condition and 'can review' to express ability in the result.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
Listening 2 of 4
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Read the transcript
If anyone calls this morning, take a clear message.
An imperative verb like 'take' can function as the result clause when giving direct instructions based on a condition.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- In "If anyone," listen for "I-fanyone": the final f joins the start of "anyone."
Listen for
At natural speed these words change shape. Tap one to hear it again.
- In "If anyone," listen for "I-fanyone": the final f joins the start of "anyone."
Listen for
At natural speed these words change shape. Tap one to hear it again.
- In "If anyone," listen for "I-fanyone": the final f joins the start of "anyone."
Try a longer clip. Listen once, then replay the part you missed.
Listening 3 of 4
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Read the transcript
If our office printer breaks again, we will order a new machine right away. Maria knows a local vendor that delivers supplies before noon.
The speaker presents a real future condition with 'breaks' and commits to action using 'will order'.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
This clip is longer. Follow the instruction above the answer field.
Listening 4 of 4
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If our company signs this contract, we will hire six new designers immediately. Our director wants people who understand modern software and can handle complex projects. However, if our partners choose another agency, we must adjust our annual budget and delay our expansion plans until January.
This excerpt contrasts two real possibilities using first conditional forms and modal verbs to describe corporate strategy.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
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Save my progressStage 3 of 5
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If our team arrives early, we can review the notes.
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Your turn
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Speak for 30 to 60 seconds from memory about a robot exhibit you want to create for a museum. Explain what happens when someone presses a button, what visitors will try, and what you would add with more money.
Use: If you press we will I would
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My exhibit is a robot that helps visitors learn about animals. If you press the green button, it makes an animal sound. You have to guess the animal before its picture appears. If the museum accepts my idea, we will invite families to try it next month. If we had more money, I would add a second robot that could answer questions. Children could ask where an animal lives or what it eats. I think families would enjoy learning together, and the game would be easy to use.
Try once more and answer this: What will visitors learn from your robot?
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