Inversion and conditionals
Look at these examples to see how we can create conditionals with inversion.
Should you have any questions, I will be happy to help.
Were they to sell their house today, they would make a huge profit on it.
I would've taken you out for lunch had I known you were in town.
Try this exercise to test your grammar.
- Grammar test 1
Read the explanation to learn more.
Grammar explanation
We use conditionals to describe the result of a condition. Often, we use if to introduce the condition (e.g. If you feel hot, …) and the main clause to give the result (... feel free to switch on the aircon).
Conditional sentences can also be created without if, using inversion. Inversion means reversing (inverting) the normal subject–verb word order in a sentence. This makes the sentence more formal.
Three types of conditionals can be formed using inversion: first, second and third conditionals.
First conditional
We use the first conditional to talk about future situations we believe are possible.
Marker pens are in the cupboard if you ever need one.
If a customer wishes to cancel their booking, they should notify us within seven days.
To invert first conditional sentences, we replace if with the auxiliary verb should and change the verb into the infinitive. This makes the situation seem a little less likely. It is often used to make a polite request or offer.
Marker pens are in the cupboard should you ever need one.
Should a customer wish to cancel their booking, they should notify us within seven days.
Second conditional
We use the second conditional to talk about situations that we consider unlikely or impossible in reality.
How would the environment be affected if everyone reduced their meat consumption?
If the Sun disappeared, Earth would no longer be able to support life.
To invert second conditional sentences, we replace if with were and change the verb form to to + infinitive.
How would the environment be affected were everyone to reduce their meat consumption?
Were the Sun to disappear, Earth would no longer be able to support life.
Note that if a second conditional sentence uses the verb be, we don't need the infinitive for the inverted version. We just replace the existing form of be with were, and invert the subject and verb.
If California were a country, it would be one of the world's largest economies.
Were California a country, it would be one of the world's largest economies.
Third conditional
The third conditional is used to imagine a change in a past situation and how things would have been different in the past as a result.
If we had lost that match, it would've been a disaster.
We would have fixed that problem by now if we'd known about it earlier.
To invert third conditional sentences, we remove if and invert the subject and the auxiliary verb had.
Had we lost that match, it would've been a disaster.
We would have fixed that problem by now had we known about it earlier.
Negative inverted conditionals
To make negative inverted conditionals, we put not after the subject.
Should you not consent to sharing this information, you may inform our company at any time. (= If you don't consent …)
Were I not good at maths, I'd find this homework very challenging. (= If I wasn't good at maths …)
Had I not been busy this morning, I would have attended the meeting. (= If I hadn't been busy …)
Do this exercise to test your grammar again.
- Grammar test 2
Hello, The LearnEnglish Team!
Firstly, I must congratulate you all for the post. It's clear, objective and think the strongest point is it offering a quiz to test how much we understood and absorbed from it.
There's just one thing that wasn't clear for me, so could you help me with that?
My question is about the following sentence:
"Marker pens are in the cupboard if you ever need one."
This sentence is marked as first conditional, but I would like to ask why it is first conditional despite it not having the "will" in the main clause. When I first looked at the sentence, I mistaked it for a zero conditional, because I'm not familiar with that structure of first conditional. How can I tell it apart from a zero conditional?
Hello PetieSweetie,
The structure you're talking about is generally presented as if + present > will + verb as this is the most common form seen. However, it's not strictly correct as other modal verbs can be used in the result clause and not just will. For example:
If the weather is good, the kids will play in the garden.
If the weather is good, the kids might play in the garden.
If the weather is good, the kids can play in the garden.
If the weather is good, the kids could play in the garden.
If the weather is good, the kids should play in the garden.
Need is sometimes called a semi-modal as it shares some characteristics of modal verbs and it can be used similarly here:
If the weather is good, the kids need to play in the garden.
Peter
The LearnEnglish Team
Hi Peter M,
Thank you for the explanation, and I have 2 questions regarding first conditionals,
1. in the given sentence, 'need' was used with 'if' in the same clause. "Marker pens are in the cupboard if you ever need one."
At the best of my knowledge, the structure of first conditional is 'if + V1, will/modal + V1'. If so, I'd like to know the more structure and reason of the given sentence where 'if' and 'need' were used in the same clause.
2. if 'need' and 'require' act like semi-modal verbs, are there other verbs that can be used alternatively for the modal verbs in first conditional?
Hello Shwe_Su,
As I said, need is what we sometimes call a semi-modal or marginal modal verb. It has some of the characteristics of modal verbs but not all. You can see this if you think about the negative forms needn't + verb and didn't need + to verb. In the past need was a full modal and forms such needn't or sentences such as Need he go? are all that remains today.
The upshot of this is that we can use need as a modal verb in a similar way to will in the result clause, but we can also use it in the if-clause.
There are other verbs which we can put in the same category. The most common are ought to, have to and dare, but whether they can be used in a similar way will depend upon the particular context of the sentence and the time reference required (general time or future time).
You can read more on the topic here:
https://en.wikipedia.org/wiki/English_modal_auxiliary_verbs
Peter
The LearnEnglish Team
Hello everyone! First of all: congratulations! this page is really useful, were it not to exist, someone would have to invent it! :)
I have a doubt over position of to in relation to the neighbouring word suddenly, somehow or possible. Is it due to the grammatical nature of these words, adverbs or adjectives? It occurs in the next sentences:
If insects suddenly died out, many plants and animals would too.
Were insects to suddenly died out,...
or in a similar one:
This project is bound to be a success. If it somehow failed, though, the company would be in trouble.
This project is bound to be a success. Were it to somehow fail, though, the company would be in trouble.
and
If it were possible to work from home in my job, I definitely would.
Were it possible to work...
Many, many thanks!
David
Dear team,
I think there is a glitch in the grammar test 2. You may like to take a look into it. Some answers are considered wrong but when the answer is shown it's exactly what was entered. Sometimes it's a matter of typing space after the last word but it does't always work.
Hello jesfalcon,
Can you please give us one or two examples of answers which are not accepted? This will help us to check the test.
Peter
The LearnEnglish Team
Hello Peter and jesfalcon,
Everything is OK in Grammar test 2. I don't know where jesfalcon has found a glitch. I completed the exercise and didn't come across any glitch.
Thanks.
Shetu Yogme,
Hello.
Could someone please help me with the next sentence from 1st test on this page?
6.If I am accepted into the training programme, I will study extremely hard.
My answer:
Were I accepted into the training programme, I would study extremely hard.
But I can't change the second part of the sentence((
Thank you.
Hello Coment,
Using 'Were' changes the meaning of the sentence, making it more hypothetical/unlikely. The original sentence uses 'If I am... / I will study...', which is more certain and suited to the kind of promise the speaker is making.
To invert a sentence like this use 'should': Should I be accepted... / I will study...
Peter
The LearnEnglish Team