Student or Learner
I would like to know what is suitiation I sould use In case, In even, If I had seen the label following these :
In Case Of Fire, do Not Use the lift
In the event of fire, do not use the lift
If a Fire Occurs, do not use the lift
What them depend on and what suitiation I sould use In case, In even?
Use the first two only.
You do not need to use capital letters, except for the first word of each sentence.
'...in case of' and 'in the event of' are usually (I won't say always) interchangeable.