How would you describe the difference between gerunds and verbs in a continuous tense to an inquisitive student?

a. 
Gerunds form the subject of a sentence while continuous verbs form the predicate.

b. 
Gerunds can take a plural form while continuous verbs cannot.

c. 
Gerunds look like continuous verbs, but they function as nouns.

d. 
“Gerund” is the grammatical term for a verb that ends in -ing.