This document contains information about Latin grammar lessons, including: 1) How many adverbs are formed from adjectives by adding "-e" or "-iter" to the adjective stem. 2) Some adverbs use the neuter accusative singular form of the adjective. 3) The declension of the words "duo", "tres tria", and rules about "centum" and "mille". 4) Cardinal and ordinal numbers from 1 to 20 in Latin. 5) Exercises are provided to decline "duo -ae -o" and conjugate the verb "dormio" in the indicative active.

1. Lesson XIII
Second Form Review;
Adverbs from Adjectives

2. Sayings
O tempora,
O mores

3. Sayings
O the times,
O the customs

4. Grammar
♦Many adverbs are
formed from 1 st/2nd-
declension adjectives
by adding ē to the
adjective stem.

5. Grammar
♦Many adverbs are
formed from 3rd-
declension adjectives
by adding iter to the
adjective stem.

6. Grammar
♦Some adverbs use the
neuter accusative
singular form of the
adjective as an adverb.
facile multum

7. Grammar
♦Duo is declined only
in the plural. (Notice
M/N in first column,
not M/F)

8. Grammar
M/N F
duo duae
duorum duarum
duobus duabus
duo (also m. duos) duas
duobus duabus

9. Grammar
♦Tres tria is declined
like the plural of
brevis –e.

10. Grammar
M/F N
tres tria
trium trium
tribus tribus
tres tria
tribus tribus

11. Grammar
♦Centum, one
hundred, and mille,
one thousand, are
indeclinable.

12. Grammar
Cardinal Ordinal
unus –a –um one primus –a –um first
duo –ae –o two secundus –a –um second
tres tria three tertius –a –um third
quattuor four quartus –a –um fourth
quinque five quintus –a –um fifth
sex six sextus –a –um sixth
septem seven septimus –a –um seventh
octo eight octavus –a –um eighth
novem nine nonus –a –um ninth
decem ten decimus –a –um tenth

13. Grammar
Roman Numeral Cardinal
XI undecim eleven
XII duodecim twelve
XIII tredecim thirteen
XIV quattuordecim fourteen
XV quindecim fifteen
XVI sedecim sixteen
XVII septendecim seventeen
XVIII duodevigenti eighteen
XIX undevigenti nineteen
XX viginti twenty

14. Practice
♦Decline duo –ae -o

15. Practice
♦Decline duo –ae -o
♦Conjugate dormio in
the indicative active (6
tenses).