Questions & Answers about Hoc opus mihi grave est, sed id finire volo.
Because opus is a neuter noun. The demonstrative hic, haec, hoc must agree with the noun it modifies in gender, number, and case.
- opus = neuter singular nominative
- so this work / this task = hoc opus
If the noun were masculine, you would expect hic; if feminine, haec.
Opus is nominative singular here, because it is the subject of est.
The basic structure is:
- Hoc opus = the subject
- grave = predicate adjective
- est = is
So literally the clause is something like This work is burdensome.
Because grave must agree with opus, which is neuter singular.
The adjective gravis, grave has these nominative singular forms:
- masculine/feminine: gravis
- neuter: grave
Since opus is neuter, Latin uses grave.