The Conditional in English
Definition of a conditional clauseA conditional clause is a type of subordinate clause, most commonly introduced by the conjunction if or unless. Like most subordinate clauses introduced by a conjunction, the conditional clause can either go before the main clause, or after it.
There are three types of conditional statement in English:
- Open conditional as in If you want, you can go home.
- Hypothetical conditional as in If you wanted, you could go home.
If you had wanted, you could have gone
Part 4: Omission of "if".
The verb of the main clause is in the future tense with "will" (or sometimes another modal).
The verb of the conditional clause is in the simple present tense.
Occasionally, the open conditional statement describes one potential state of reality or circumstance which is dependent on another. In this case, both verbs are in the present tense.
- If I sleep well at night, I feel much happier next morning.
- If you have a coffee at night, you won't sleep well.
- If the temperature falls below zero, it freezes.
- If it rains, everyone gets wet.
would + infinitive, or could +infinitive);
The verb of the conditional clause normally uses the present subjunctive or preterite (these two tenses are identical except with to be). Occasionally, the conditional aspect of the statement can be emphasised by using the form were + to + infinitive.
- 1A If you ate too much, you'd (you would) get fatter.
- 1B You'd get fatter if you ate too much.
- 2A If everyone worked faster, we would / could finish in time.
- 2B We wouldn't finish in time unless everyone worked faster.
- 2C If everyone were to work faster, we would/could finish in time.
- 3 If I went to London, I would / could visit the British Museum.
- 4. If you visited Scotland, you could see Edinburgh Castle.
- 5 Unless the directors increased sales, we'd have to close this shop.
- 6. If I were you, I'd .......... As in: If I were you, I'd go a bit slower
or If I were you, I'd put that gun down !!
This form is also used in cases of reported speech.
- My professor told me I'd do much better if I worked harder.
- The magistrate informed him that he'd go to prison unless he stopped stealing.
- The newspaper reported that unless the directors could increase sales, they'd have to close the shop.
The verb of the main clause goes in the past conditional (would have + past participle).
The verb of the conditional clause goes in the past perfect (had + past participle).
- If you had eaten too much, you'd (you would) have got fatter.
- You'd have got fatter if you'd eaten too much.
- If everyone had worked fast, we'd have finished in time (but we didn't).
- We wouldn't have finished in time unless everyone had worked fast (but we did).
- If I had gone to London, I could have visited the British Museum (but I didn't).
- If you had visited Scotland, you could have visited Edinburgh Castle (but you didn't).
- Unless we'd been very confident of success, we wouldn't have even tried. (But we were confident, we did try, and we succeeded).
"Unless" means the same as "if ...
not", and has a negative value. It is frequently (but not only) used in
conditional statements where the verb of the main clause is
in the negative.
- You wouldn't have fallen over unless there'd been a banana skin on the ground.
- = You wouldn't have fallen over if there hadn't been a banana skin on the ground.
When this happens the subject follows the auxiliary verb in the conditional clause
- Were the virus to reappear, hospitals would now be ready for it. (open hypothesis)
- = If the virus reappeared, hospitals would now be ready for it.
If the virus were to
reappear, hospitals would now be
ready for it.
- Had I known, I'd never have gone there (unfulfilled hypothesis; implying "I did go there because I did not know".)
- = If I had known, I'd never have gone there.