Lesson 08. Practice with the First Declension

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At this point in our study, we pause to practice what we already know about First Declension nouns. Nothing new is introduced here. The purpose of this work is to make the forms familiar and steady, so that we no longer hesitate when we see or use them. Mastery at this stage comes from repetition, not from additional explanation.

We begin by recalling what we know about declension itself. A declension is the variation of a noun by cases. We have already seen how this works in practice, because we have declined Musa, Aeneas, Anchises, and Penelope through all six cases, in both singular and plural. Each change in form corresponds to a different use of the noun in a sentence.

We also know that the declension of a noun is identified by the ending of its Genitive singular. When we examined the nouns Musa, Aeneas, and Anchises, we saw that their Genitive singular ends in -ae. When we examined Penelope, we saw that its Genitive singular ends in -es. Because of these Genitive endings, all four nouns belong to the First Declension.

Although there are many First Declension nouns in Latin, they all follow one of the four patterns we have already learned. This is an important point. Once we know how to decline Musa, Aeneas, Anchises, and Penelope, we already know how to decline every other First Declension noun.

For example, nouns such as vita meaning “life,” vera meaning “true,” gloria meaning “glory,” gratia meaning “grace,” Levita meaning “Levite,” propheta meaning “prophet,” and via meaning “way” follow the same pattern as Musa. Their Nominative singular ends in -a, and their Genitive singular ends in -ae, so they take exactly the same forms. Thus vita is declined as vita, vitae, vitae, vitam, O vita, a vita in the singular, and vitae, vitarum, vitis, vitas, O vitae, a vitis in the plural. The same endings apply without change to gratia and propheta. Knowing the forms of Musa means we already know the forms of all nouns like it.

The same principle applies to proper names such as Helias and Esaias. These nouns follow the same pattern as Aeneas. Their Nominative singular ends in -as, their Genitive and Dative singular end in -ae, their Accusative singular ends in -am or -an, their Vocative singular ends in -a, and their Ablative singular ends in -a. In the plural, they follow the regular First Declension endings.

Likewise, the name Moses follows the same pattern as Anchises. Its Nominative singular ends in -es, its Genitive and Dative singular end in -ae, its Accusative singular ends in -en, its Vocative singular ends in -e, and its Ablative singular ends in -e. In the plural, it takes the regular First Declension plural endings.

From this we see that learning the four example nouns gives us control over the entire First Declension. Whenever we encounter a new noun, we determine its declension by looking at its Genitive singular ending. If it ends in -ae, or in -es when the Nominative ends in -e, then it belongs to the First Declension and is declined according to one of these patterns.

Once we are comfortable with substantive nouns of the First Declension, we see that adjectives work in the same way. An adjective such as vera meaning “true” belongs to the First Declension. When it is used with a noun like musa, the adjective must agree with the noun in gender, number, and case. Thus we say musa vera for “a true muse,” musae verae for “of a true muse,” musam veram for “a true muse” as a direct object, and a musa vera for “from a true muse.” In the plural we say musae verae, musarum verarum, musis veris, musas veras, and a musis veris. The adjective changes its ending to match the noun, using the same declensional forms we already know.

We also remember that there are a few First Declension words that behave slightly differently in the plural. Words such as Dea meaning “goddess,” Filia meaning “daughter,” Ambae meaning “both,” and Duae meaning “two” take -abus in the Dative and Ablative plural instead of -is, in order to distinguish them from masculine forms such as Deus and Filius. This exception must be remembered exactly as stated.

The work of this lesson is to practice these forms until they can be produced accurately and without hesitation. Proper nouns are usually declined only in the singular, but they follow the same patterns as other nouns of the First Declension. Whether we practice by writing the declensions by hand, by reciting them aloud, or by using quizzes, the aim is the same: complete familiarity with the forms, so that they no longer require conscious effort.

We do not add anything beyond this. We repeat, we write, and we memorize, until the First Declension is fixed firmly in mind and ready for use.

Memory Work

With this lesson, we review the rules of the first declension of Latin nouns.

1. How many different terminations are found in the Nominative case of the First Declension?
Four: -a, as Musa; -as, as Aeneas; -es, as Anchises; and -e, as Penelope.

2. How are First Declension nouns with Nominative in -a declined?
As haec Musa: with Nominative in -a; Genitive and Dative in -ae; Accusative in -am; Vocative in -a; Ablative in -a. In the plural, Nominative in -ae; Genitive in -arum; Dative in -is; Accusative in -as; Vocative like the Nominative; Ablative in -is.

In short: -a, -ae, -ae | -am, -a, -a | -ae, -arum, -is | -as, -ae, -is.

3. Decline the First Declension noun haec Musa. (State the case name, the Latin form and the English.)
Singulariter: Nominativo, haec Musa, a Muse; Genitivo, Musae, of a Muse; Dativo, Musae, to a Muse; Accusativo, Musam, a Muse; Vocativo, O Musa, O Muse; Ablativo, a Musa, from a Muse. Pluraliter Nominativo, Musae, Muses; Genitivo, Musarum, of Muses; Dativo, Musis, to Muses; Accusativo, Musas, Muses; Vocativo, O Musae, O Muses; Ablativo, a Musis, from Muses.

In short: Musa, Musae, Musae | Musam, Musa, Musa | Musae, Musarum, Musis | Musas, Musae, Musis.

4. What is meant by the words “of”, “to”, “O” and “from” used when declining?
These words “of”, “to”, “O” and “from” are signs of the Cases with which they are joined, and are put to all Nouns. “Of” signifies the Genitive case. “To” signifies the Dative case. “O” signifies the Vocative case. “From” signifies the Ablative case. The Nominative and Accusative cases are not known by signs, but by their position in a sentence.

5. How are First Declension nouns with Nominative in -as declined?
As hic Aeneas: with Nominative in -as; Genitive and Dative in -ae; Accusative in -am or -an; Vocative in -a; Ablative in -a. In the plural, as normal.

In short: -as, -ae, -ae | -am/an, -a, -a | -ae, -arum, -is | -as, -ae, -is.

6. Decline the First Declension noun hic Aeneas. (State the case name, the Latin form and the English.)
Singulariter: Nominativo, hic Aeneas, Aeneas; Genitivo, Aeneae, of Aeneas; Dativo, Aeneae, to Aeneas; Accusativo, Aeneam or Aenean, Aeneas; Vocativo, O Aenea, O Aeneas; Ablativo, ab Aenea, from Aeneas. Pluraliter: as normal.

In short: Aeneas, Aeneae, Aeneae | Aeneam or Aenean, Aenea, Aenea | Aeneae, Aenearum, Aeneis | Aeneas, Aeneae, Aeneis.

7. How are First Declension nouns with Nominative in -es declined?
As hic Anchises: with Nominative in -es; Genitive and Dative in -ae; Accusative in -en; Vocative in -e; Ablative in -e. In the plural, as normal.

In short: -es, -ae, -ae | -en, -e, -e | -ae, -arum, -is | -as, -ae, -is.

8. Decline the First Declension noun hic Anchises. (State the case name, the Latin form and the English.)
Singulariter: Nominativo, hic Anchises, Anchises; Genitivo, Anchisae, of Anchises; Dativo, Anchisae, to Anchises; Accusativo, Anchisen, Anchises; Vocativo, O Anchise, O Anchises; Ablativo, ab Anchise, from Anchises. Pluraliter: as normal.

In short: Anchises, Anchisae, Anchisae | Anchisen, Anchise, Anchise | Anchisae, Anchisarum, Anchisis | Anchisas, Anchisae, Anchisis.

9. How are First Declension nouns with Nominative in -e declined?
As haec Penelope: with Nominative in -e; Genitive in -es; Dative in -e; Accusative in -en; Vocative in -e; the Ablative in -e. The plural number ends normally.

In short: -e, -es, -e | -en, -e, -e | -ae, -arum, -is | -as, -ae, -is.

10. Decline the First Declension noun haec Penelope. (State the case name, the Latin form and the English.)
Singulariter: Nominativo, haec Penelope, Penelope; Genitivo, Penelopes, of Penelope; Dativo, Penelope, to Penelope; Accusativo, Penelopen, Penelope; Vocativo, O Penelope, O Penelope; Ablativo, a Penelope, from Penelope; Pluraliter: as normal.

In short: Penelope, Penelopes, Penelope | Penelopen, Penelope, Penelope | Penelopae, Peneloparum, Penelopis | Penelopas, Penelopae, Penelopis.

11. Are there places where these rules do not apply?
Yes. In some words, such as Dea (goddess), Filia (daughter), Ambae (both) and Duae (two), the Dative and Ablative cases end in -abus, rather than -is. This is mainly to distinguish them from their masculine forms like Deus and Filius.

12. Summary of the First Declension:

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