Unless and Other Conditional Words

unless = if not; provided that, as long as, in case.

Examples

• Unless you hurry, you'll be late.

Key rules

• Unless means if not
• Do not use a negative verb after unless
• As long as, provided that and on condition that mean only if
• In case means because it might happen, not if it happens

Common mistakes

• Unless you do not hurry, you will be late → Unless you hurry, you will be late
• Take an umbrella if it rains → Take an umbrella in case it rains