Unit 2 Just in case in case

Just in case and in case is a very common short expression use in English you can use it in some situations but first you need to follow some rules.

You can use “in case” to talk about past situation or future situations (precaution).

And use “just in case” when you want to add emphasis it is going to be at the end of the sentence and is usually used to talk about precautions.

http://speakspeak.com/english-grammar-exercises/upper-intermediate/unless-in-case-of-in-case-as-long-as