In Latin, regular verbs typically have four principal parts. These parts are used to form various tenses and voices. The four principal parts of a regular verb are:
- 1st Principal Part: The first person singular present indicative (e.g., "amo" for "I love").
- 2nd Principal Part: The present infinitive (e.g., "amare" for "to love").
- 3rd Principal Part: The first person singular perfect indicative (e.g., "amavi" for "I loved").
- 4th Principal Part: The perfect passive participle (e.g., "amatus" for "having been loved").
These four parts provide the necessary forms to conjugate the verb in various tenses and grammatical structures.