What's the meaning of phrase 'should there be' when it isn't used in questions?

[Rbstall]

What's the meaning of phrase "should there be" when it isn't used in questions?

Example: Should there be no subject of the first person, the verb is put in the 2nd person.

Thanks for your help!

[Lost_Soul]

Should there be ... basically means if there's

[Rbstall]

Thanks, Alex. Is this phrase used very often?

[Lost_Soul]

Hmm... I can't tell for sure. We need to wait for a native English speaker to tell us how often they use this clause

[Yankee]

Yes, it is used fairly often, usually in formal contexts.
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