2.  The base of the participial stem is found by dropping -us from
the perfect passive participle.

202. In English the perfect, past perfect, and future perfect tenses of the indicative passive are made up of forms of the auxiliary verb to be and the past participle; as, I have been loved, I had been loved, I shall have been loved.

Very similarly, in Latin, the perfect, pluperfect, and future perfect passive tenses use respectively the present, imperfect, and future of sum\ as an auxiliary verb with the perfect passive participle, as

  Perfect passive, ama’tus sum\, _I have been_ or _was loved_
  Pluperfect passive, ama’tus eram\, I had been loved
  Future perfect passive, ama’tus ero\, _I shall have been loved_

  1.  In the same way give the synopsis of the corresponding tenses of
  moneo\, rego\, capio\, and audio\, and give the English meanings.

203. Nature of the Participle.  A participle is partly verb and partly adjective.  As a verb it possesses tense and voice.  As an adjective it is declined and agrees with the word it modifies in gender, number, and case.

204. The perfect passive participle is declined like bonus, bona, bonum\, and in the compound tenses (Sec. 202) it agrees as a predicate adjective with the subject of the verb.

EXAMPLES IN SINGULAR
Vir laudatus est, the man was praised, or has been praised
Puella laudata est, the girl was praised, or has been praised
Consilium laudatum est, the plan was praised, or
has been praised

EXAMPLES IN PLURAL
Viri laudati sunt, the men were praised, or have been praised
Puellae laudatae sunt, the girls were praised, or
have been praised
Consilia laudata sunt, the plans were praised, or
have been praised

1.  Inflect the perfect, pluperfect, and future perfect indicative
passive of amo\, moneo\, rego\, capio\, and audio\ (Secs.
488-492).

205. The perfect passive infinitive is formed by adding esse\, the present infinitive of sum\, to the perfect passive participle; as, ama’t-us (-a, -um) esse\, _to have been loved_; mo’nit-us (-a, -um) esse\, to have been advised.

  1.  Form the perfect passive infinitive of rego\, capio\, audio\,
  and give the English meanings.

206. The future active infinitive is formed by adding esse\, the present infinitive of sum\, to the future active participle.  This participle is made by adding /-urus, -a, -um\ to the base of the participial stem.  Thus the future active infinitive of amo\ is amat-u’rus (-a, -um) esse\, to be about to love.

    a. Note that in forming the three tenses of the active infinitive
    we use all three conjugation stems: