Gerund & Gerundive — ad legendum / liber legendus est
Distinguish the gerund (verbal noun: ad legendum, "for reading") from the gerundive (verbal adjective: legendus, "to be read"). Form the gerundive of obligation (legendus est + dative of agent) and translate Carthago delenda est accurately.
A lesson of Latin B1 — Intermediate, in Passive Voice Mastery, about 10 minutes.
By the end of this lesson, you will distinguish the gerund from the gerundive, form both correctly, and translate the gerundive of obligation ("must be ___ed").
Two Related but Different Forms
Latin has two verbal-noun/adjective forms that look similar but function very differently:
| Form | Type | Function |
|---|---|---|
| Gerund | verbal noun (neuter 2nd decl.) | "the act of ___ing" |
| Gerundive | verbal adjective (1st/2nd decl.) | "deserving/needing to be ___ed" |
The Gerund: A Verbal Noun
The gerund is formed from the gerundive stem and declines only in the singular, in four cases (no nominative — the infinitive covers that slot):
Formation: present stem + -nd- + 2nd declension neuter endings
For legere (to read):
| Case | Form | Typical use |
|---|---|---|
| Gen. | legendi | "of reading" |
| Dat. | legendo | "for reading" |
| Acc. | legendum | "(after preposition) reading" |
| Abl. | legendo | "by/through reading" |
The most common use is genitive (after causa/gratia = "for the sake of") and accusative with ad (= "for the purpose of"):
Ad legendum veni. — "I came for the purpose of reading." / "I came to read." Causa legendi. — "For the sake of reading." Ars scribendi. — "The art of writing."
Check: How would you express "for the purpose of fighting" using the gerund of pugnare? (pugnare → gerund )