Linking verbs can never take direct objects. The first principal part ends in io as does a fourth conjugation verb, but the infinitive ends in short ere as does a third conjugation verb. Mixed conjugation verbs are frequently called third conjugation io verbs. It is called the subjunctive because it includes several different uses joined under its broad heading. The nominative singular form of a Latin noun is the first word in its dictionary listing.
All Latin nouns have the properties of case , number , and gender .
Nouns, pronouns, adjectives and verbs are either singular or plural. It is formed from a verb stem and has the verbal properties of tense and voice, but it has adjectival endings and has the adjectival properties of case, number and gender. Participles, just as all Latin adjectives, agree in case, number and gender with the nouns they modify. In contrast to English in which the subject of a verb is almost always named, Latin can omit subjects, particularly when they are pronouns because Latin verbs have personal endings which indicate the person and number of the verb. A passive verb can never take a direct object.