in case

Do something now because another thing might happen later.

• Take a coat in case it gets cold.
• I saved a copy in case my computer failed.
• Should we buy extra food in case more guests come?

How to use it: in case + clause (Take your keys in case I leave early.)

Similar words: as a precaution against the possibility that

Common phrases: just in case, in case something happens, in case it rains

Use this to say what will happen if a particular situation occurs.

• In case you need me, call.
• In case she calls, tell her I am busy.
• In case anything goes wrong, who should we contact?

How to use it: in case + clause (In case you need help, call this number.)

Similar words: if

Common phrases: in case you need, in case anything happens, in case someone calls

Do something because an unwanted event or situation is possible.

• Keep a torch in case of a power cut.
• We checked again in case we had missed a name.
• She kept a spare key in case of trouble.

How to use it: in case of + noun (Keep some cash in case of an emergency.); in case + clause (Check the list in case we forgot someone.)

Similar words: as a precaution against

Common phrases: just in case, in case of fire, in case of emergency

This introduces a situation that must happen for something else to follow.

• In case of illness, stay home.
• What happens in case the bus is late?
• The ticket is refunded in case of cancellation.

How to use it: in case of + noun (In case of cancellation, you will receive a refund.); in case + clause (What should we do in case nobody arrives?)

Similar words: if, in the event of

Common phrases: in case of failure, in case of illness, in case she comes