Breakdown of Servus librum in bibliotheca invenit et dominam vocat.
Questions & Answers about Servus librum in bibliotheca invenit et dominam vocat.
The subject is servus because it’s in the nominative singular (the “default” dictionary form for many 2nd-declension masculine nouns ending in -us). So servus is the one who both invenit and vocat.
Librum is accusative singular, used here as the direct object of invenit (what he finds). The noun is liber, libri (2nd declension), and its accusative singular ending is -um.
Here it means in the library because in is followed by the ablative: bibliothecā (1st declension ablative singular, ending -ā).
Rule of thumb:
- in + ablative = location (in/on)
- in + accusative = motion toward (into/onto)