or changes of endings.  In English we have three cases,—­nominative, possessive, and objective; but, in nouns, the nominative and objective have the same form, and only the possessive case shows a change of ending, by adding ’s or the apostrophe.  The interrogative pronoun, however, has the fuller declension, who? whose? whom?

33. The following table shows a comparison between English and Latin declension forms, and should be thoroughly memorized: 

ENGLISH CASES                         LATIN CASES
+---+-------------+--------------+------------------+-------

---------+
|   | Declension  | Name of case | Declension of    | Name of case   |
|   | of who?   | and use      | domina\         |   and use      |
|   |             |              | and translation  |                |
+---+-------------+--------------+------------------+-------

---------+
|   | Who?        | Nominative-- | do’min-a         | Nominative--   |
| S |             |  case of the |  _the lady_      |  case of the   |
| I |             |  subject     |                  |  subject       |
| N |             |              |                  |                |
| G | Whose?      | Possessive-- | domin-ae         | Genitive--     |
| U |             |  case of the |  _the lady’s_    |  case of the   |
| L |             |  possessor   |  _of the lady_   |  possessor     |
| A |             |              |                  |                |
| R | Whom?       | Objective--  | domin-am         | Accusative--   |
|   |             |  case of the |  _the lady_      |  case of the   |
|   |             |  object      |                  |  direct object |
+---+-------------+--------------+------------------+-------

---------+
|   | Who?        | Nominative-- | domin-ae         | Nominative--   |
|   |             |  case of the | _the ladies_     |  case of the   |
| P |             |  subject     |                  |  subject       |
| L |             |              |                  |                |
| U | Whose?      | Possessive-- | domin-a:’rum     | Genitive--     |
| R |             |  case of the |  _the ladies’_   | case of the    |
| A |             |  possessor   |  _of the ladies_ | possessor      |
| L |             |              |                  |                |
|   | Whom?       | Objective--  | domin-a:s        | Accusative--   |
|   |             |  case of the |  _the ladies_    |  case of the   |
|   |             |  object      |                  |  direct object |
+---+-------------+--------------+------------------+-------

---------+

When the nominative singular of a noun ends in -a, observe that

    a. The nominative plural ends in -ae.

    b. The genitive singular ends in -ae and the genitive plural in
    -a:rum.

    c. The accusative singular ends in -am and the accusative plural
    in -a:s.

    d. The genitive singular and the nominative plural have the same
    ending.