5.6 Interrogative pronouns

Forms of Interrogative Pronouns

Latin interrogative pronouns let you ask "who?" "what?" and "which?" They decline for gender, number, and case just like other Latin pronouns, and you'll need to recognize their forms to read questions correctly in both direct and indirect constructions.

Quis and Quid (Substantive / Pronoun Forms)

The substantive interrogative pronoun (used on its own, not modifying a noun) has these core nominative forms:

• Quis = "who?" (masculine/feminine singular)
• Quid = "what?" (neuter singular)

These are the forms you'll see in straightforward questions like Quis est ille? ("Who is that man?") or Quid facis? ("What are you doing?").

Qui, Quae, Quod (Adjective Forms)

When the interrogative modifies a noun directly, Latin uses the adjective forms:

• Qui (masculine singular), quae (feminine singular), quod (neuter singular)
• Quae puella cantat? = "Which girl is singing?"
• Quod verbum non intellegis? = "Which word don't you understand?"

These look identical to the relative pronoun forms, so context is your main clue for telling them apart.

Declension Patterns

The interrogative pronoun follows a pattern that blends features of the third declension in the singular with first/second declension endings in the plural.

Key forms to memorize:

A few things to notice:

• Genitive and dative singular are the same for all genders: cuius and cui. This is distinctive and worth drilling.
• The neuter nominative/accusative singular ends in -d when used as an adjective (quod) but not as a standalone pronoun (quid).
• Plural forms look just like the relative pronoun quī, quae, quod.

Usage in Questions

Direct Questions

In a direct question, the interrogative pronoun typically comes first in the sentence, and the verb stays in the indicative mood.

• Quis venit? = "Who is coming?"
• Quem vidēs? = "Whom do you see?"

Don't confuse interrogative pronouns with the yes/no question particles -ne, num, and nonne. Those particles turn statements into yes/no questions and don't involve interrogative pronouns at all. Interrogative pronouns ask for specific information ("who," "what," "which").

Indirect Questions

An indirect question is a subordinate clause that reports a question rather than asking it directly. It typically follows verbs of asking, wondering, or not knowing (like rogō, mīror, nesciō).

The critical rule: indirect questions require the subjunctive mood.

• Nesciō quis vēnerit. = "I don't know who came." (perfect subjunctive)
• Rogat quid faciās. = "He asks what you are doing." (present subjunctive)

Sequence of tenses applies here. If the main verb is in a primary tense (present, future), use primary subjunctive tenses in the subordinate clause. If the main verb is in a secondary tense (imperfect, perfect, pluperfect), use secondary subjunctive tenses.

Meaning and Translation

Who vs. Which vs. What

Choosing the right English translation depends on how the pronoun is used:

• Quis/quid (substantive) = "who" for people, "what" for things
• Quī/quae/quod (adjective, modifying a noun) = "which" or "what"
• Quod animal vidēs? = "Which animal do you see?" or "What animal do you see?"

Differences from English Usage

Latin handles a few things differently than English:

• There's no separate word for "whom." Latin uses case to show the difference. Quis is nominative ("who"), quem is accusative ("whom"), cui is dative ("to whom"), etc.
• Latin interrogative adjectives sometimes appear where English would use a different construction entirely.
• Word order is more flexible in Latin, so the interrogative doesn't always need to be the very first word, especially in poetry or for stylistic emphasis.

Quid vs. Quod

This distinction trips up a lot of students, so it's worth isolating:

• Quid is the substantive (pronoun) form. It stands alone and means "what?" in a general sense. Quid facis? = "What are you doing?"
• Quod is the adjective form. It modifies a specific neuter noun. Quod verbum non intellegis? = "Which word don't you understand?"

If there's a neuter noun right there being modified, use quod. If the pronoun stands on its own, use quid.

Interrogatives with Prepositions

When you need to ask "to whom," "from whom," "about what," etc., combine a preposition with the interrogative pronoun in the appropriate case.

Common Prepositional Phrases

• Ad quem = to whom (acc.)
• Ā quō = from whom (abl.)
• Dē quō = about whom/which (abl.)
• In quō = in which (abl.)
• Cum quō = with whom (abl.)
• Prō quō = for whom/which (abl.)

Example: Ad quem scrībis? = "To whom are you writing?"

Word Order

Standard prose puts the preposition before the pronoun (dē quō). In poetry or rhetorical prose, you may see the order reversed or the preposition separated from its object for emphasis: Quō dē negōtiō loqueris? = "About what business are you speaking?"

Interrogative Adverbs

These aren't pronouns, but they're closely related and often taught alongside them. Interrogative adverbs ask about circumstances rather than identities.

• Ubi = "where?" (location) — Ubī habitās? = "Where do you live?"
• Quō = "to where? / whither?" (direction) — Quō īs? = "Where are you going?"
• Unde = "from where? / whence?" (origin) — Unde venīs? = "Where are you coming from?"
• Cūr = "why?" (reason) — Cūr hoc facis? = "Why are you doing this?"

Relationship to Pronouns

These adverbs often correspond to prepositional phrases with interrogative pronouns:

• Ubi ≈ in + ablative ("in what place?")
• Quō ≈ ad + accusative ("to what place?")
• Unde ≈ ab + ablative ("from what place?")

Recognizing these parallels helps you see that Latin sometimes offers two ways to ask the same question.

Interrogatives in Subordinate Clauses

Relative Clauses vs. Indirect Questions

Since the relative pronoun (quī, quae, quod) and the interrogative adjective look identical, you need context to tell them apart. Two reliable clues:

1. The main verb. If it's a verb of asking, knowing, wondering, or perceiving, the subordinate clause is probably an indirect question.
2. The mood. Indirect questions take the subjunctive. Relative clauses typically use the indicative.

Compare:

• Sciō quid faciās. = "I know what you are doing." (indirect question, subjunctive)
• Videō quod facis. = "I see what/that which you are doing." (relative clause, indicative)

Subjunctive Mood in Indirect Questions

Every indirect question uses the subjunctive, and the sequence of tenses governs which subjunctive tense you pick. This is one of the most common places you'll encounter the subjunctive in Latin prose, so get comfortable recognizing it.

Common Interrogative Expressions

A couple of phrases show up so often that they're worth memorizing as set expressions:

• Quid agis? — Literally "What are you doing?" but commonly used as a greeting, like "How are you?" The plural form is Quid agitis?
• Quid novī? — "What's new?" or "Any news?" The novī is a partitive genitive ("what of new things?"). You'll see this in letters and casual dialogue.

Cultural Context

Roman Courtroom Interrogation

Questions were a powerful rhetorical weapon in Roman courts. Orators like Cicero used carefully structured interrogative sequences to corner opponents and build arguments. Reading his speeches (like the In Catilinam orations, which open with a barrage of questions) gives you a vivid sense of how interrogatives functioned in real rhetorical practice.

The Socratic Method in Latin

Roman philosophers, especially Seneca, adapted the Greek tradition of teaching through questions. Their dialogues are full of interrogative constructions used to guide the reader toward conclusions step by step. Recognizing these patterns makes philosophical Latin much easier to follow.