PARTICIPLES
A participle is a form of a verb which acts as an adjective (or noun).
It agrees with its noun in number, gender and case!
There are four types of participles to learn:
- Present Active Participle 
- Future Active Participle 
- Perfect Passive Participle 
- Future Passive Participle 
PRESENT ACTIVE PARTICIPLE:
The present active participle describes an action/state that happens at the same time as the action/state of the main verb.
It is often translated as ‘—ing’. E.g. ‘The loving girl’. It can also be translated as a relative clause - e.g. ‘the girl who is loving’ (amans puella)
To form the present active participle, remove the -re from the present infinitive and add -ns. (3rd/4th conjugation add an -i-, 4th conjugation add an -e-.
(1st) amo, amare, amavi, amatus = amans
(2nd) deleo, delere, delevi, deletus = delens
(3rd) emo, emere, emi, emptus = emens
(3rd/4th) capio, capere, cepi, captum = capiens
(4th) audio, audire, audivi, auditus = audiens
The stem of a present active participle ends -nt- and has the same endings as 3rd declension adjectives:
*The ablative becomes amanti if it is used only as an adjective.
** The masc/fem nominative and accusative plurals can end -is as well as -es.
FUTURE ACTIVE PARTICIPLE:
A future participle describes an action/state which will happen after the action/state of the main verb
A future active participle is translated as ‘about to ——’ or ‘going to —-’
E.g. femina dictura virum vidit = The woman, about to speak, saw her husband.
It is formed by removing -um from the 4th principal part (Perfect passive participle) and adding -urus.
E.g. amo, amare, amavi, amatus —> amaturus
They decline like 1st and 2nd declension adjectives like bonus, -a, -um (E.g. amaturus, amatura, amaturum)
PERFECT PASSIVE PARTICIPLE:
A perfect passive participle describes an action/state that happens before the action/state of the main verb.
It is often translated as ‘having been ——’ or ‘after being ——’.
E.g. puer vocata cucurrit =
- ‘the boy, having been called, ran’ 
- ‘After being called, the boy ran’ 
- ‘When he had been called, the boy ran’ 
- The boy, who had been called, ran’ 
It is formed by taking the fourth principal part of a verb (perfect passive participle) and adding its endings.
E.g. audio, audire, audivi, auditus —> auditus, audita, auditum
They decline like 1st and 2nd declension adjectives like bonus, -a, -um.
FUTURE PASSIVE PARTICIPLE:
The future passive participle is translated as ‘about to be ——’ or ‘going to be —-’.
It’s most common usage is a gerundive - go to the gramma section on gerundives for more detail!
It is formed by removing -ns from the end of a present participle and adding -ndus.
E.g. deleo, delere, delevi, deletus —> delens —> delendus
They decline like 1st and 2nd declension adjectives like bonus, -a, -um (e.g. delendus, delenda, delendum)
USES OF PARTICIPLES:
- As adjectives - as seen in the various examples on this page 
- Gerundives with the future passive participle (see the grammar section on this) 
- Ablative Absolutes (see the grammar section on this) 
