interrogative adverbs

Interrogative Adverbs in French

Interrogative adverbs are used to ask about specific circumstances such as place, time, quantity, reason, and manner. The most common ones are où (where), quand (when), combien (how much/many), pourquoi (why), and comment (how).

1. Question Structures and Registers

The structure of a question in French changes depending on the level of formality (register). This is especially true when using a subject pronoun (je, tu, on, etc.):

• Familiar (Informal): The subject and verb keep their normal order, and the adverb is placed at the end.
  On peut acheter des timbres où ? (Where can one buy stamps?)
• Neutral: Use the phrase est-ce que after the adverb.
  Où est-ce qu’on peut acheter des timbres ? (Where can one buy stamps?)
• Formal: Use inversion (swap the verb and the subject pronoun).
  Où peut-on acheter des timbres ? (Where can one buy stamps?)

All of these could be answered with: À la poste. (At the post office.)

2. Using Noun Subjects

When the subject is a noun (like a person's name), the same range of registers applies:

• Familiar: Frédéric arrivera quand ? (When will Frédéric arrive?)
• Neutral: Quand est-ce que Frédéric arrivera ? (When will Frédéric arrive?)
• Formal (Complex Inversion): Quand Frédéric arrivera-t-il ? (When will Frédéric arrive?)

3. Special Rule for "Pourquoi"

With the adverb pourquoi (why), you cannot use simple subject-verb inversion if the subject is a noun. You must use complex inversion (keeping the noun and adding a pronoun) or est-ce que.

• Correct: Pourquoi le bébé pleure-t-il ? (Why is the baby crying?)
• Incorrect: Pourquoi pleure le bébé ?

4. Prepositions with Adverbs

Adverbs like où, quand, and combien can be preceded by a preposition. Usually, the same preposition is repeated in the answer:

• Depuis combien de temps étudiez-vous le français ? — Depuis six mois. (How long have you been studying French? — For six months.)
• Jusqu’à quand… ? — Jusqu’au 15 mai. (Until when...? — Until May 15th.)
• Par où les voleurs sont-ils passés ? — Par la lucarne du grenier. (Which way did the thieves go through? — Through the attic skylight.)

5. Short Questions and Complements

Inversion is very common in short, simple questions (e.g., Où vas-tu ? / Where are you going?). However, simple inversion is impossible when the verb is followed by a complement and the subject is a noun. For example, if you want to use the formal style with a noun subject and a complement:

• Correct: Avec qui sort Marie ? (Who is Marie going out with?)
• Note: You would not use simple inversion like "Marie sort avec qui ?" in a formal inverted structure.

6. The Interrogative Infinitive

The infinitive form of a verb can be used in interrogative sentences. This is often used to express hesitation or internal reflection rather than asking a direct question to someone else:

• À qui s’adresser ? (Whom to contact?)
• Que dire ? (What to say?)
• Comment faire ? (How to do it?)