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

English as a Second Language English Vocabulary, Grammar and Idioms
1

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 !!

2

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

3

[color=red]If [color=green]is used for something that, according to the speaker, might happen.

[color=red]in case of [color=green](incorrect in case if, in the case of) can be used to shorten an if-clause as shown below:
“[color=red]If [color=green]there is danger, leave the forest” = [color=red]“In case of [color=green]danger, leave the forest.”

[color=green]While [color=red]if [color=green]expresses a [u]condition /u, [color=red]in case [color=green]is used to express a possibility (2).

[color=green]1) I need spectacles [color=red]if [color=green]I want to read. (I cannot read without them)
[color=green]2) I need spectacles [color=red]in case [color=green]I want to read. (I might possibly want to read during my journey)

[color=blue]Maryann

4

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.

5

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

Regards,
Tilt