Study this example:
You are getting ready for a trip. You should take some food because you might get hungry.
You should take some food in case you get hungry.
(in case=because you might…)
I’ll leave the lights on in case you need to go to the bathroom.
You should take a map just in case we get lost.
(just in case=smaller possibility)
Do NOT use will after in case.
- We’ll cook something in case Mark comes.
=Maybe he’ll come. We’ll cook something now, whether he comes or not; then we’ll already have something to eat if he comes.
- We’ll cook something if Mark comes.
=Maybe Mark will come. If he comes, we’ll cook something; if he doesn’t we won’t cook anything.
I took a map in case I got lost.
(in case+past=why somebody did something)
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