I think I'm a little mixed up with how the irregular adjectives work.
§111 I.2
Latin: Nulli malo puero praedam dat magister.
nullus, -a, um (§108) is an irregular adjective that has the form nulli in the dataive singular. ("to none, to no")
puero is the dative singular or ablative singular (§91) of puer; the adjective malo agrees in case, gender, and number with puero (§65) "to the (from the) bad boy"
praedam is the direct object (accusative singular §37) of the verb dat.
dat is the 3rd person singular form of the verb "to give"
magister is in the nominative singular.
So nulli refers to the indirect object here, the boy, which is singular.
"The master gives the reward to no bad boy."
To say, "The master gives no reward to the bad boys." would be
Nullam praedam malis pueris dat magister.
It seemed from the key that nulli referes to praedam so I'm not sure if I've understood this properly.
- Tim

