～場合(は)
In the event that something happens
You'll be able to state what applies in a particular case, especially in rules and formal guidance.
地震の場合は、机の下に入ってください。
jishin no baai wa, tsukue no shita ni haitte kudasai.
What do you think this sentence means?
In case of an earthquake, please get under the desk.
Describe what to do in a case
～場合は means in the case that a situation occurs. It is common in instructions, procedures, and contingency plans, and sounds more formal than an everyday たら.
遅れる場合は、連絡してください。
okureru baai wa, renraku shite kudasai.
If you are going to be late, please contact us.
Form and use ～場合(は)
Use 雨の場合 and 静かな場合. Keep the situation before 場合 and the applicable response afterward. は may be omitted.
遅れる場合は、連絡してください。
okureru baai wa, renraku shite kudasai.
If you are going to be late, please contact us.
危険な場合は、入らないでください。
kiken na baai wa, hairanaide kudasai.
If it is dangerous, please do not enter.
電車が止まった場合は、バスを使ってください。
densha ga tomatta baai wa, basu o tsukatte kudasai.
In the event that the trains stop, please use the bus.
火事の場合は、エレベーターを使わないでください。
kaji no baai wa, erebeetaa o tsukawanaide kudasai.
In case of fire, do not use the elevator.
予約をキャンセルする場合は、前の日までに電話してください。
yoyaku o kyanseru suru baai wa, mae no hi made ni denwa shite kudasai.
In the event that you cancel your reservation, please call by the day before.
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