Some obscure abbreviations

I have some abbreviations. The context is either grammer or Biblical only. I tried to look for clues or solutions but to no avail.
I will be very grateful to any answer.

ptc.
Vrss. rd.
inf. cstr. vb. I guess inf - is infinitive and vb. is verb. what is cstr.?

Thank you very much

Yes, they do seem to be very obscure. I've checked several dictionaries and only 'inf = informal' matches any of your examples. 'Verb' is usually denoted as 'v,' so I don't think 'vb' = 'verb.' Could you provide some examples of the abbreviations in context?

A guess: I think they might relate to linguistics/grammar. In the "Dictionary of American Regional English," the list of abbreviations includes inf. = informant and constr(s) = construct(ed), construction(s), construed. I don't see the other abbreviations.

I heartily agree with the motion for context. But lacking that, I'm all in favor of Very reverend sirs for Vrss.