Questions & Answers about Circus hodie plenus est.
Latin has no articles. That means it has no separate words for the or a/an.
So circus can mean:
- the circus
- a circus
Which one is meant depends on context. In a simple sentence like this, English often uses the: The circus is full today.
Circus is nominative singular. It is the subject of the sentence: the thing being described as full.
It comes from the second-declension noun circus, circī. In the nominative singular, a masculine second-declension noun often ends in -us, so circus is the basic subject form.
Because plenus is an adjective, and Latin adjectives must agree with the noun they describe in:
- gender
- number
- case
Since circus is masculine singular nominative, plenus must also be masculine singular nominative.
So:
- circus = masculine singular nominative
- plenus = masculine singular nominative
They match.