The three kinds of nouns we'll be dealing with for the first several chapters. Each represents a "type" of noun. And many other nouns will follow the same patterns as these three. You'll see all three here "in the singular" (singuláriter) and one of them "in the plural" (pluráliter). You'll notice that each of them is the SUBJECT of its sentence. This is very important, and the *form* that you see each word in also conveys its *function* in the sentence. The word _pulchra/pulcher/pulchri/pulchrum_ means "beautiful". Going through this, why do you think I had you learn English words like _stimulus_ and _nucleus_?