Grammar
Second and third conditionals: unreal situations and regret
You miss a train and think about an earlier choice. If I had left sooner, I would have caught it. Later, you imagine a different job: If I worked closer to home, I would walk there.
Use the second conditional for unreal present or future situations and the third conditional for imagined past situations and regrets.
Read and practice
Read the examples and try the written questions in this guide. Listening recordings are not available for this lesson yet.
Try the written questions
If I had known, I would have called. /ɪf aɪ hæd nəʊn, aɪ wʊd əv kɔːld/
The short answer
Use if plus a past form and would plus a base verb for an unreal situation now or later: If I lived nearby, I would walk. Use if plus past perfect and would have plus a past participle for an unreal past: If I had lived nearby, I would have walked.
If Noor had checked the address, she would have found the office.
Why it works: Had checked refers to an earlier action that did not happen. Would have found gives the imagined past result.
5 more examples
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If I had a spare room, I would invite my cousin to stay.
Had describes an unreal situation now. The speaker does not have a spare room available.
Not this:If I
have a spare room next month, I will invite my cousin to stay. What changes: Have and will invite describe a real future possibility rather than an imagined present situation. -
If the museum opened later, we would visit after work.
Opened refers to an imagined timetable now or in the future, not to a past visit.
Not this:If the museum
opens later on Friday, we will visit after work. What changes: This sentence leaves open the possibility of a later opening on one future day. -
If Maya had saved the file, she would have kept her notes.
Had saved points to an earlier action that did not happen before the notes were lost.
Not this:If Maya
saved the file now, she would keep her notes. What changes: This second conditional imagines a different action and result in the present or future. -
If we had known about the roadworks, we would have taken the train.
The speakers learned about the roadworks too late to change their past journey.
Not this:If we
knew about the roadworks, we would take the train. What changes: This sentence imagines what the speakers would do with information available now. -
If I were you, I would read the contract again.
Were gives advice from an imagined position. The speaker is not really the listener.
Not this:If
you read the contract again, you may spot the error. What changes: This first conditional describes a possible action by the real listener.
Read the full guide
First, ask when the imagined situation belongs. Use the second conditional when you are changing a situation now or later. Use the third conditional when you are changing an earlier event. The past forms show distance from reality, not always past time.
Decide which time you are changing
You are describing a different version of reality. First decide whether that version is about your life now, a possible later situation, or an event that has already finished. That time choice tells you whether to use the second or third conditional.
If I spoke Italian, I would apply for the role in Rome.
Speaking Italian is an unreal ability now, so this is a second conditional.
If I had spoken Italian, I would have applied for the role in Rome.
The application period has ended, so this sentence imagines a past change.
Which pattern fits a decision that ended last week?
Use the third conditional because both the imagined choice and its result belong in the past.
Build the second conditional
After if, use a past simple form. In the other clause, use would plus the base verb. The past form creates distance from a real situation. It does not say that the situation happened in the past.
If the flat cost less, we would rent it.
Cost less describes an unreal price now. Would rent describes the imagined result.
If Daniel lived nearer, he would join us more often.
Daniel's home is not near enough for this imagined result to be real now.
Complete the sentence: If the café ____ open, we would meet there. Choose were or had been.
Choose were for an unreal situation now. Had been would point to an earlier situation.
Use were for imagined advice
When you give advice with If I were you, you are taking an imagined position. Were is the usual careful form with I, he, she, and it in this pattern. It helps listeners recognize that the advice is not a report about real identity.
If I were you, I would ask the manager for a clearer deadline.
The speaker cannot become the listener. The sentence offers advice through an imagined situation.
If the printer were working, we would send the forms today.
The printer is not working, so the result remains imagined.
Which word completes careful advice: If I ____ you, I would wait?
Use were. If I were you is a standard second-conditional form for advice.
Build the third conditional
For a past situation you want to change, use had plus a past participle after if. Use would have plus a past participle for the imagined past result. Both clauses look back at a time that cannot now be changed.
If the team had left earlier, they would have arrived on time.
Had left is the imagined earlier choice. Would have arrived is the imagined past result.
If Leo had brought his charger, he would have finished the presentation.
Leo did not bring the charger, and the presentation was not finished in that past situation.
Choose the result: If I had seen the message, I ____ sooner. Choose would reply or would have replied.
Choose would have replied because the missed message and the imagined reply are both in the past.
Avoid mixing the two patterns
Keep the forms matched to the time you mean. If you are regretting a finished event, use the third conditional in both clauses. If the result matters now, a mixed conditional may be possible, but start by making the basic time relationship clear.
If I had accepted the offer, I would live abroad now.
Had accepted is a past cause, while would live describes the result now. This is a mixed conditional.
If I accepted the offer, I would live abroad.
This sentence imagines a choice and a result that are both still open now or later.
Does If I had accepted the offer, I would live abroad now describe one past time only?
No. The choice belongs in the past, but living abroad is the result in the present.
Before you go
Remember this
Choose the second conditional when the imagined situation is about now or later: if plus past simple, then would plus a base verb. Choose the third conditional when you are changing an earlier event: if plus past perfect, then would have plus a past participle. The time of the imagined situation decides the pattern.
Practice with the written examples
You can practice with the written questions in the Learn tab. Each answer includes an explanation.
Try the written questionsListening test not available yet
This lesson does not have the recordings needed for a listening test. Use the written questions in the guide to check your understanding.
Try the written questionsQuestions about "Second and third conditionals: unreal situations and regret"
What is the difference between the second and third conditional?
Use the second conditional for an unreal situation now or later, such as If the flat cost less, we would rent it. Use the third conditional for an imagined past, such as If the team had left earlier, they would have arrived on time. The time of the imagined situation chooses the pattern.
If I had a spare room, I would invite my cousin to stay.
Why does the second conditional use a past form?
The past form after if creates distance from a real situation. If Daniel lived nearer, he would join us more often is about Daniel's situation now, not about a past home. The form shows that the speaker is imagining a different reality.
If I have a spare room next month, I will invite my cousin to stay.
How do I form the third conditional?
Use had plus a past participle in the if-clause, then would have plus a past participle in the result clause. If Leo had brought his charger, he would have finished the presentation changes an earlier action and its earlier result.
If the museum opened later, we would visit after work.
Is if I were you a second conditional?
Yes. If I were you, I would read the contract again gives advice from an imagined position. Were is the usual careful form in this pattern, especially with I. The speaker is not claiming to be the listener.
If the museum opens later on Friday, we will visit after work.
What is a mixed conditional?
A mixed conditional connects two different times. If I had accepted the offer, I would live abroad now has an imagined past choice and a present result. Start with the basic second and third patterns, then use a mixed form when the time relationship needs it.
If Maya had saved the file, she would have kept her notes.