Common mistakes

Ce à quoi or ce que? French corrections with penser à and tenir à

See why ce à quoi keeps the à in penser à, répondre à and tenir à. Compare what you think with what you think about, then test the distinction.

In short

Ce à quoi means “what” when the French expression needs à: penser à quelque chose → ce à quoi je pense. Compare Je sais ce que tu penses (“I know what you think”) with Je sais ce à quoi tu penses (“I know what you are thinking about”). Both sentences are correct; their meanings differ.

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Two people reflecting on a family conversation.
L’o explains ce à quoi il pense after speaking with his grandmother. Illustration: Atelier
  • ce à quoi je pensece que je pense àwhat I am thinking about

    Voilà ce à quoi je pense depuis hier.That is what I have been thinking about since yesterday.

    Move à with quoi. The expression starts from je pense à cela.

  • ce à quoi je tiensce que je tienswhat I care about

    Ce à quoi je tiens, c’est à la transmission de ma langue.What I care about is passing on my language.

    Tenir à expresses attachment. Tenir quelque chose means holding something.

  • ce à quoi je répondsce auquel je répondswhat I am responding to

    Voici ce à quoi je dois répondre avant vendredi.Here is what I need to respond to before Friday.

    After neutral ce, use à quoi. With a named noun, use la question à laquelle je réponds.

  • ce à quoi nous pensonsce à quoi nous y pensonswhat we are thinking about

    Ce à quoi nous pensons concerne toute la famille.What we are thinking about concerns the whole family.

    à quoi already carries the topic complement. Remove the extra y referring to that same topic.

When do you use ce à quoi instead of ce que?

Après une conversation en famille
  1. Nora

    Tu as l’air préoccupé. À quoi tu penses ?

    You look worried. What are you thinking about?

  2. Léo

    À la conversation avec ma grand-mère.

    About the conversation with my grandmother.

  3. Nora

    Je comprends ce à quoi tu penses. Mais qu’est-ce que tu en penses ?

    I understand what you are thinking about. But what do you think of it?

  4. Léo

    Je pense que nous devrions lui parler plus souvent.

    I think we should speak to her more often.

The topic is the conversation; the opinion is that the family should speak to her more often. Ce à quoi keeps the topic after penser à. Ce que tu penses can introduce the content of the thought or opinion.

Question 1No account needed
Keep the meaning of Nous pensons à cela.Je comprends ___ nous pensons.

Choose one answer.

Answer and explanation

ce à quoi. The starting expression is penser à cela, so keep à in ce à quoi.

Question 2No account needed
Use a named feminine noun.La question ___ je réponds est personnelle.

Choose one answer.

Answer and explanation

à laquelle. The named antecedent la question is feminine singular: à laquelle.

Question 3No account needed
Which sentence concerns thought content?

Choose one answer.

Answer and explanation

Je sais ce que tu penses.. Ce que tu penses gives the thought or opinion; ce à quoi gives its topic.

Question 4No account needed
Remove the duplicated topic complement.

Choose one answer.

Answer and explanation

Ce à quoi je pense est important.. Ce à quoi already replaces à cela. The additional y duplicates that complement.