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French Phrase

C'est quoi ton activité préférée en plein air ?

/sɛ kwa tɔ̃ aktivite pʁefeʁe ɑ̃ plɛ̃ ɛʁ/

Meaning"What’s your favorite outdoor activity?"

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Meaning

Literally, "What is your favorite activity in the open air?" It is an informal way to ask someone which outdoor pastime they enjoy most. The structure "C'est quoi..." is typical of spoken French and sounds friendly and relaxed.

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When to use

Use this question in casual conversations with friends, classmates, or colleagues when you want to learn about someone's hobbies. It works well in settings like a picnic, a sports club, or a language‑exchange meetup.

✦Grammar Breakdown

C'estquoitonactivitépréféréeenpleinair?

1

C'est

Contraction of "cela est"; used to introduce a definition or identification, especially in informal speech.

2

quoi

Question word placed after "c'est" in colloquial French; equivalent to "what" in English.

3

ton

Possessive adjective for "your" (singular, informal). It agrees in gender and number with the noun that follows.

4

activité préférée

"Activité" is a feminine noun; "préférée" must agree in gender and number (feminine singular).

5

en plein air

Fixed prepositional phrase meaning "outdoors"; literally "in full air".

🗨In Conversation

A

C'est quoi ton activité préférée en plein air ?

What’s your favorite outdoor activity?

J'adore la randonnée, surtout dans les Alpes.

I love hiking, especially in the Alps.

B

✕Common Mistakes

Quel est ton activité préférée en plein air ?
Use "Quelle est" because "activité" is feminine; "Quel" is masculine.
C'est quoi votre activité préférée en plein air ?
Mixing informal "c'est quoi" with the formal "votre" sounds inconsistent; choose either fully informal or fully formal.
C'est quoi ton activité préféré en plein air ?
The adjective must agree with the feminine noun "activité"; it should be "préférée".

↔Alternatives

Quelle est ton activité préférée en plein air ?
What is your favorite outdoor activity?
Qu'est‑ce que tu aimes faire en plein air ?
What do you like to do outdoors?
Quel loisir en plein air te plaît le plus ?
Which outdoor pastime do you like the most?

Cultural Tip

In France, common outdoor activities include randonnée (hiking), vélo (cycling), pétanque, and « faire du sport » in parks. When you ask this question, you’ll often hear a follow‑up like « Tu vas souvent où ? » (Where do you usually go?). Keep the tone informal; with strangers or in a formal setting you’d prefer "Quelle est votre activité préférée en plein air ?" using the polite "vous".