to be verbs

[atabitaraf]

I didn't see you there. Were you there?
Is it grammatically wrong if I say "Did you be there?"
I think both of them can be used, at least in speaking, can't they?

[bhaisahab]

I didn't see you there. Were you there?
Is it grammatically wrong if I say "Did you be there?"
I think both of them can be used, at least in speaking, can't they?

No. "Did you be there" is wrong in standard English.

[5jj]

The auxiliary DO is used with BE only in the negative and the emphatic forms of the imperative:

Don't be silly.
Do be careful.