Adding should to the if-clause of a first conditional makes the condition sound more remote or less expected, as in if you should happen to see him, let him know, or the more formal should there be any issues, contact support. This should does not express obligation, only reduced likelihood.
Grammar Rule
Adding should to the if-clause of a first conditional makes the condition sound more remote or less expected. The structure is if + subject + should + base verb, with the main clause following normal future or imperative patterns. This should does not express obligation — it simply flags reduced likelihood.
Should for Unreal/Remote Possibility in Formal English: Rules and Examples
| Structure | Effect | Example |
|---|---|---|
| If + subject + should + base verb | softens condition, marks remote possibility | If you should happen to see him, let him know. |
| Should + subject + base verb (inverted, no if) | even more formal tone | Should there be any issues, contact support. |
Remember: Should in the if-clause marks the condition as remote or unlikely, adding formality — it does not express obligation here.
Practice Test
Instructions
Answer each question in the test below using should for remote possibility correctly. You will get a new random set of questions every time you retake the test, plus a downloadable results summary with your name and score at the end.
Should for Remote Possibility Exercises (CEFR C2)
Click «Start the test» to begin right away — no signup required. You can get a personalized certificate with your name and score at the end, if you want one.
Frequently Asked Questions
What does adding should to the if-clause do?
It makes the condition sound more remote or less expected, as in if you should happen to see him, let him know.
Does this should express obligation?
No, it simply flags reduced likelihood.
What is the more formal, inverted version without if?
Should there be any issues, contact support.
What is the structure of this pattern?
If + subject + should + base verb, with the main clause in normal future or imperative form.