Using “in case” in English

• “in case” is a conjunction which is used to join two clauses. ( one of them expresses an action, the other expresses the reason )
• “in case” is used before the clause which indicates the reason/cause.
• “in case” is used to indicate the reason or cause of the action which is mentioned before.

Examples:

•    I will not go to my office by my car in case it snows. ( Action – Reason )

             ( It snows – possibility / I will not go… – precaution )

•    My mother put a cake in my handbag in case I was hungry. ( Action – Reason )

             ( I was hungry – possibility / My mother put a cake… – precaution )

•    Her father always gives her some money in case she can need it. ( Action – Reason )

             ( She can need it – possibility / Her father always gives her some money – precaution )

•    Take your hat in case it is sunny. ( Action – Reason )

             ( It is sunny – possibility / take your hat – precaution )

•    I put the keys here in case I forget. ( Action – Reason )

             ( I forget – possibility / I put the keys here – precaution )

•    Take an umbrella in case it rains. ( Action – Reason )
  

             ( It rains – possibility / Take an umbrella – precaution )

•    The teacher wrote down the student’s homework on a piece of paper in case he should forget his homework. ( Action – Reason )

             ( he should forget… – possibility / the teacher wrote down – precaution )

•    Take an extra singlet, just in case.
•    It might sunny today so you should take your hat just in case.
•    He don’t think he will need any money. However, he will bring some money just in case.