Questions & Answers about Ren in corpore est.
Why is corpore used instead of corpus?
Because in is showing location here: in the body, not movement into the body.
In Latin, in takes:
- the ablative for location: in corpore = in the body
- the accusative for motion toward: in corpus = into the body
The noun is corpus, corporis, so its ablative singular form is corpore.
What case is ren?
Ren is nominative singular. It is the subject of est, so it is the thing that is somewhere.
The dictionary form is ren, and the full entry is ren, renis.
What case is corpore?
Corpore is ablative singular.
That is because the preposition in, when it means in/on/within in the sense of location, normally takes the ablative.
So:
- ren = subject, nominative
- corpore = object of the preposition in, ablative