The reader is assumed to know the grammatical notions of person and number, so in most cases, we only work with first person singular. Subtleties of usage will be ignored, at least for the time being. In the second part of these notes, general rules are given for verb conjugation. These are rough in that there are some changes of vowels and vowel lengths that are completely ignored in this section. Principal parts for amare , to love, to like amo, amare, amavi, amatus .
Some verbs are impersonal , i.e. , they only exist in the third person singular.
Some verbs are intransitive , i.e. , they do not take direct objects. The fourth principal part of these verbs is either the neuter form of the perfect passive participle for verbs intransitive verbs which take an indirect object in the dative case, or the future active participle for other intransitive verbs. Intransitive verbs which take indirect objects may have impersonal passive voice forms which are occasionally tricky to translate. Some verbs are deponent which means that they are passive in form but active in meaning. The Modern English tense system does not quite correspond with the Latin tense system, particularly in certain uses of the perfect tenses.