[*] 165.
Every form of the finite verb is made up of two parts:
- The STEM (see § 24). This is either the root or a modification or development
of it.
- The ENDING, consisting of—
- the Signs of Mood and Tense (see §§ 168, 169).
- the Personal Ending (see § 163).
Thus in the verb
vocā-bā-s,
you were
calling, the root is VOC, modified into the verb-stem
vocā-, which by the addition of the
ending
-bās becomes the imperfect
tense
vocābās; and this ending
consists of the tense-sign
bā-
and the personal ending (
-s) of the second
person singular.