Take your umbrella in case it's rain. vs Take your umbrella If it it rain.

[Tilt]

So, my mind-breaker is like that:

Take your umbrella in case it's rain

Take your umbrella If it it rain

Do you see any difference between these two sentence?

And this one:

May I start my sentence with "In case if.... blah-blah-blah...

Or there might be more preferable "In the case of...blah-blah-blah...

Thanks a million to everyone !!
_________________
We are what we repeatedly do.

[Morteza]

Hi,
We use "in case" to talk about precautious-things we do to be ready for what might happen.
Take your umbrella(now) in case it rains(later).
Take your umbrella(later) if it rains(and if it doesn't,don't take it).
Regards,
Morteza

[Maryann]

If is used for something that, according to the speaker, might happen.

in case of (incorrect in case if, in the case of) can be used to shorten an if-clause as shown below:
"If there is danger, leave the forest" = "In case of danger, leave the forest."

While if expresses a condition (1), in case is used to express a possibility (2).

1) I need spectacles if I want to read. (I cannot read without them)
2) I need spectacles in case I want to read. (I might possibly want to read during my journey)

Maryann

[Cerberus™]

I agree with Morteza. Tilt, your two example sentences are not possible. "In case if" isn't possible either. "In the case of" is possible, but all depends on context.

[Tilt]

How clever you are all three )) Thanks for your consideration. My corporative teacher said the same things.

Regards,
Tilt
_________________
We are what we repeatedly do.