Questions & Answers about Civis locuples non semper immunis est.
Because civis is in the nominative singular, which is the case normally used for the subject of a sentence.
Here, est means is, so the sentence is structured like:
- civis = subject
- locuples = adjective describing the subject
- immunis = predicate adjective after est
- est = verb
So civis is the person being talked about: the/a citizen.
Civis is nominative singular here.
A learner may notice that civis can also be genitive singular in some contexts, but in this sentence it is clearly nominative because:
- it fits as the subject of est
- the adjectives locuples and immunis also match it as nominative singular
- the meaning of the sentence requires a subject: A wealthy citizen is not always exempt/immune
So syntax helps you identify the case.