If... should

[IDONTKNOWENGLISH]

Here's another question. I'm learning english and I'm so curious!
In this sentence:
If he should ask you don't tell him. or If that should happen it would be better to leave.
What's the use of 'should'? If he asks you don't tell him. is the same?

[Barb_D]

Hi,
I split off your post because it was not related to your first question. It's a good idea to start a new thread when you have a new question.

The "If you should X" makes the idea seem less likely that simply saying "If you X."

[IDONTKNOWENGLISH]

Oh... I'm sorry. I didn't know about it. I've understood it. Thanks!

[omasta]

There is another construction with the same meaning in which should can be placed first and if omitted: Should he ask, don't tell him; Should that happen, we'd better leave.

[Barb_D]

Same as "if" - but note the verb tense: that's in the subjunctive. So "If he falls" but "Should he fall."