I was trying to think of a good way to teach Latin grammar in baby steps, but I think it will be easier to just get through the basics as quickly as possible so we can get to the interesting stuff.
So as I said before, there are 5 noun declensions. This lesson will cover the first three, which are all much more commonly used than the 4th and 5th declensions.
Before I begin, I will quickly review how a noun is declined. First of all, “declining” is now you change a noun depending on several factors.
Singular vs. Plural – there are different forms for singular and plural nouns. English has a very simplified version of this – “rat” is singular, and “rats” is plural. Notice how you append an “s” to “rat” to make it plural.
Case – the case of a noun is how the noun is used in a sentence. I explained cases pretty thoroughly earlier, so hopefully you understand them. Every case has a singular and plural version.
Gender – the Romans (or probably their precursors) decided that every single noun had to have a gender. So in the Latin language every noun is one of three genders – female (feminine), male (masculine), and neuter. Now when it comes to a noun being feminine or masculine, its gender does not affect how it is declined. You just decline it based on what declension it is in. However, when a noun is neuter, you always decline it slightly differently than a feminine or masculine noun.
1st Declension – The first declension is composed almost entirely of feminine nouns ending in -a in the nominative case and -ae in the genitive case, like puella, -ae, f., girl. Notice the prevalence of -ae endings in the chart below. It is kind of annoying.
hihihihihihihihihSingular: Plural:
Nominative: puella puellae
Genitive: puellae puellarum
Dative: puellae puellīs
Accusative: puellam puellās
Ablative: puellā puellīs
2nd Declension – The second delcension is composed mostly of masculine nouns ending in -us in the nominative case and -ī in the genitive case, like servus, -ī, m., slave. However, there are a few nouns that end in -r or -er in the nominative but are declined as a second declension noun otherwise – puer, -ī, m. boy; vir, -ī, m., man; ager, agrī, m., field. So the genitives of puer, vir, and ager are puerī, virī, and agrī, respectively.
hihihihihihihihihSingular: Plural:
Nominative: servus servī
Genitive: servī servorum
Dative: servō servīs
Accusative: servum servōs
Ablative: servō servīs
2nd Declension neuter – There are also neuter nouns that are declined as second declension nouns. The most important feature of all neuter nouns is that they have the same endings for both the nominative and accusative forms. For example, baculum, -ī, n., staff, is a neuter noun. So if you wanted to say, for some reason, “The staff hits the staff,” you would say in Latin, “Baculum verberat baculum,” whereas if you wanted to say, “The slave hits the slave,” you would say, “Servus verberat servum.” Do you see how the ending for baculum does not change while the ending for servus does? That is pretty much the difference between masculine and neuter second declension nouns. The one other divergence between the two is that the nominative and accusative plural for the neuter nouns always end with -a, as opposed to -ī and -ōs. So “the staffs hit the staffs” would be “bacula verberant bacula,” whereas “the slaves hit the slaves” would be “servī verberant servōs.” Unfortunately, the -a ending for plural nominative and accusative second declension neuter nouns looks an awful lot like the singular nominative ending for first declension verbs (like puella). In those cases, you have to use your intuition, I guess (“Is a staff feminine? Is a girl neuter?”). You can also use the verb for help, because the verb changes form depending on whether or not the subject is plural (bacula verberant vs. puella verberat). Unfortunately, since neuter nouns have the same form for the nominative and accusative, you could interpret “bacula verberant” as “they beat the sticks” OR as “the sticks beat.” In these cases, you have to rely on common sense and intuition.
hihihihihihihihihSingular: Plural:
Nominative: baculum bacula
Genitive: baculī baculorum
Dative: baculō baculīs
Accusative: baculum bacula
Ablative: baculō baculīs
3rd Declension – The third declension is a bit more complicated than the first and second declensions. If the first and second declensions were made by the Romans to encompass feminine nouns ending with -a and masculine (and some neuter) nouns ending with (mostly) -us, respectively, then the third declension was kind of made as a bag for all of the other miscellaneous nouns the Romans had that didn’t fit into any of the other declensions. The third declension includes feminine, masculine, and neuter nouns. The nominative endings for the nouns follow no patterns (well, they actually do, but for all purposes right now, it is completely random). I think of the third declension as the declension for all the junk nouns with nominative endings that didn’t follow either first or second declensions (or the fourth and fifth declensions). Unfortunately, third declension nouns are probably the most commonly used in Latin. On the bright side, feminine and masculine nouns are declined the same, and neuter nouns are declined almost the same. Unfortunately, because of this, you can’t tell just by looking what gender a third declension noun is, so you have to memorize their genders. Also, since third declension nouns have all sorts of nominative forms, you have to memorize their stems (by memorizing what they look like in the genitive form), so you know how to decline them.
hihihihihihihihihSingular: Plural:
Nominative: pater patrēs
Genitive: patris patrum
Dative: patrī patribus
Accusative: patrem patrēs
Ablative: patre patribus
Here’s an example – pater, patris, m., father. At first glance, pater looks like it could be a second declension noun like ager. However, upon seeing its genitive form patris, you can tell instantly that it is not second declension, because all singular second declension nouns end with -ī in the genitive form. Now with pater, it is pretty easy to remember that it is masculine. However, there are many words like vox, vocis, f., voice, that are gender-neutral in English but are assigned specific genders in Latin. After this you might be wondering what the use of memorizing noun genders is. Well, adjectives are declined based on the noun they modify, and, you guessed it, gender matters in adjective declension.
3rd Declension neuter – This is similiar to the second declension neuter, but this time it’s in the guise of a third declension noun. You can often detect a third declension neuter noun by look for nouns with nominative endings like -men, -al, and -ut (nomen, animal, caput). There are also quite a few third declension neuter nouns that end in -us in the nominative, like stercus, -oris (dung), genus, -eris (race), latus, -eris (side), facinus, -oris (crime), and funus, -eris (funeral). As a side note – when I list something like stercus, -oris, I mean that stercus is the nominative singular form and that stercoris is genitive singular form (and sterc- is the stem of the noun).
hihihihihihihihihSingular: Plural:
Nominative: nomen nomina
Genitive: nominis nominum
Dative: nominī nominibus
Accusative: nomen nomina
Ablative: nomine nominibus
Yay! That’s over with. Just make sure to memorize all the endings.
Repetition – as you memorize the endings, one issue that might worry you is the amount of overlap on endings. Many endings are repeated in between singular and plural, between cases, and between declensions. You would think that if the Romans decided to have so many endings, they would at least make them all different. However, that is not the Roman way, and all Latin learners will just have to learn to deal with it. Here are some tips:
- Memorize – memorize not only the endings and where they are used, but also the gender and stem of each noun you encounter. It’s hard, but if you concentrate it’s not too bad.
- Look at the rest of the sentence – often other words in the sentence can give you hints at what gender and declension your noun is. Verbs show whether the noun is singular or plural, and adjectives show whether the noun is singular or plural as well as the noun’s case and gender. Of course, I haven’t taught you adjectives yet, so that doesn’t really help…
- Knowledge of the cases – noun cases are extremely important, and I will definitely go more in-depth on them later. For example, only subtle knowledge of the ablative and dative cases can let you decide what case “patribus” is.
- Intuition – only trust your intuition if you know half or more of what you are doing. If you don’t even know half of what you are doing, study more…