Relative pronouns join sentences together. These words signal a relative clause which explains the noun called the antecedent.When there is no specific antecedent, ce is added as an artificial one.But it can refer to only things, not people.If the relative pronoun is the subject of the clause, use qui.If the relative pronoun is the direct object of the clause, use que.If the verb of the dependent clause requires the preposition de, use dont.If the antecedent is a place or time, use où.
|C’est ce qu’il pense.||That’s what he thinks.||no antecedent|
|Je lis un livre qui est très bon.||I read a book which is very good.||qui is subject|
|Il a lu la lettre que tu as écrite.||He read the letter that you wrote.||que is object|
|C’est ce dont j’ai peur.||That is what I am afraid of.||avoir peur is followed by de|
|C’est l’hôtel où nous allons.||It’s the hotel we are staying.||hôtel is a place|