1. 1st and 2nd declension Adjectives
EVERY ADJECTIVE MUST AGREE WITH THE NOUN IT MODIFIES IN
NUMBER
GENDER
& CASE

2. NUMBER IF THE NOUN IS SING SO MUST THE ADJECTIVE BE SINGULAR
puella bona, puellae bonae, puellae bonae, puellam bonam, puellA bonA
IF THE NOUN IS PLURAL SO MUST THE ADJECTIVE BE PLURAL
puellae bonae, puellarum bonarum, puellis bonis, puellas bonas, puellis bonis

3. 1st and 2nd declension adjective chart
M F N M F N
Nom: bonus bona bonum boni bonae bona
Gen: boni bonae boni bonorum bonarum bonorum
Dat: bono bonae bono bonis bonis bonis
Acc bonum bonam bonum bonos bonas bona
Abl bono bonA bono bonis bonis bonis

4. Gender (and here’s the rub)
If the noun is masculine so must the adjective be masculine
If it is feminine, I need the feminine adjective
If Neuter, then I need the neuter endings.
Pretty simple, but what about words like Nauta, ae, m, sailor?
Nota Bene: I need masculine endings for the adj...use the adj chart

5. CASE
Case is easy...if the noun is dative I need the dative of the adjective
etc, etc, so let’s practice
to the good friend amico bono (dat/masc/sing)
for the good girls puellis bonis (dat/fem/pl)
of the good horses equorum bonorum (gen/masc/pl)
of the good sailors nautarum bonorum (gen/masc/pl)
The bad boy waits for the good girls. Puer malus puellas bonas expectat.