Inverted conditionals: had I known
Had I known, should you need, were I to: formal conditionals without if.
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In formal English, a conditional can start without if. Instead, had, should or were goes before the subject. The meaning does not change, but the sentence sounds more formal and a little more literary. You will see it in business letters, reports, news and novels.
Only these three words can be used this way.
With if | Inverted |
|---|---|
If I had known, I would have told you. | Had I known, I would have told you. |
If you need any help, call me. | Should you need any help, call me. |
If I were in your position, I'd resign. | Were I in your position, I'd resign. |
If the plan were to fail, ... | Were the plan to fail, ... |
If it were not for her, ... | Were it not for her, ... |
If it had not been for her, ... | Had it not been for her, ... |
Had: unreal past conditions
Had + subject + past participle replaces if + subject + had in the third conditional and in mixed conditionals.
- Had we left earlier, we wouldn't have missed the train.
- Had she accepted the offer, she would be living in Rome now.
- Had I realised how expensive it was, I would never have booked it.
In the negative, not goes after the subject, and there is no contraction.
- Had they not warned us, we would have driven straight into the flood.
- Incorrect: Hadn't they warned us, we would have driven into the flood.
- Correct: Had they not warned us, we would have driven into the flood.An inverted conditional never takes a contraction.
Should: possible future conditions
Should + subject + base form replaces if in a first conditional. It makes the situation sound less likely, and very polite. The main clause is often an imperative or uses will. It is typical of formal letters, emails and instructions.
- Should you have any questions, please do not hesitate to contact us.
- Should the problem continue, call the helpline.
- Should the weather turn bad, the event will move indoors.
- Incorrect: Should you will need anything, let me know.
- Correct: Should you need anything, let me know.After should, use the base form.
Were: unreal present and unlikely future
Were + subject replaces if + subject + were in a second conditional with be. Were + subject + to + base form talks about an unlikely future event.
- Were I your manager, I would insist on a written report.
- Were the decision mine, I would cancel the project.
- Were the company to collapse, thousands of jobs would be lost.
- Were we to accept their terms, we would lose money.
- Incorrect: Was I in your position, I would complain.
- Correct: Were I in your position, I would complain.The inverted form is always were, for every person.
Were it not for, had it not been for
These mean "without" or "if something didn't exist / hadn't happened". Were it not for is about now; had it not been for is about the past.
- Were it not for the tourists, the village would be empty.
Without the tourists today, ...
- Had it not been for your help, we would never have finished on time.
Without your help in the past, ...
- But for the rain, the match would have been a success.
A shorter formal way to say if it hadn't been for.
What cannot be inverted
Other verbs and other conjunctions stay with the normal pattern. Did, would, could and was do not replace if, and unless, provided and as long as are never inverted.
- Incorrect: Did I know the answer, I would tell you.
- Correct: If I knew the answer, I would tell you.Only had, should and were can replace if.
- Incorrect: Would you like more information, please call us.
- Correct: Should you require more information, please call us.Would you like more information? is a question, not a condition. Only should can replace if here.
- Incorrect: Provided should the weather be fine, we'll eat outside.
- Correct: Provided the weather is fine, we'll eat outside.