Overview
Learn unless, provided that, as long as, supposing, and other conditional forms.
Alternatives to 'if'
- unlessUnless it rains, we'll go. (= if it doesn't rain)
- providedProvided (that) / As long as you study, you'll pass.
- supposingSupposing / Imagine you won — what would you do?
- in caseIn case it rains, take an umbrella. (precaution)
Key Distinctions
- unless = if … not · can replace if-not conditionals
- as long as / provided that = on the condition that (more emphatic)
- in case = taking precautions (looks forward, not hypothetical)
- even if = the result stays the same regardless of the condition
Common Mistakes
- ❌ Unless you won't come → ✅ Unless you come (no negative after unless)
- ❌ I'll bring water in case it will rain → ✅ in case it rains
- ❌ Providing you will help → ✅ Provided that you help (present simple)
When to use
Precaution (in case)
Take your phone in case you get lost.
Negative condition
Unless you apologise, she won't speak to you.
Formal condition
Provided that all parties agree, the deal proceeds.
Hypothetical
Supposing you had a million pounds — what then?