How do you write these sentences in le passe compose?

*Catherine la voit.

*Le coiffeur les coupe. (les refers to les pommes)

et

*La fille la met sur la table.

1. The infinitive is voir. The past participle is vu. Catherine l'a vue. Now, past participles agree in number (singular/plural) and gender (feminine/masculine) with the PRECEDING direct-object pronoun. In this case, the sentence in the present tense is "la" so you know it is feminine. Notice the additional "e" on the end of the past participle?

2. Yes, you need to know what "les" refers to, because that could be masculine or feminine plural. Knowing that it is "les pommes" you now know that the past participle must be feminine plural. BUT what is a hairdresser or barber doing cutting apples or potatoes????? au p.c. = Le coiffeur les a coupées.

3. Again the preceding direct object will be feminine singular, so I must put the "e" on the end of the past participle. La fille l'a mise sur la table.

Sra (aka Mme)

Feel free to ask any other questions you might have. Now that you are doing the passé composé, verbs that take être have the past participle agreeing with the subject, but verbs that take avoir have the past participle agreeing with the PRECEDING direct-object (be in noun or pronoun).

To form the sentence in "le passé composé" (the compound past tense) in French, you will need to use the auxiliary verb "avoir" or "être" conjugated in the present tense, followed by the past participle of the main verb.

Here's how you can rewrite the sentences in the passé composé:

1. Catherine la voit. (Catherine sees her.)
To put this sentence in the passé composé, you need to conjugate the auxiliary verb "avoir" and add the past participle of the main verb "voir" (to see). The past participle of "voir" is "vu."
Rewrite: Catherine l'a vue. (Catherine saw her.)

2. Le coiffeur les coupe. (The hairdresser cuts them.)
To put this sentence in the passé composé, you need to conjugate the auxiliary verb "avoir" and add the past participle of the main verb "couper" (to cut). The past participle of "couper" is "coupé."
Rewrite: Le coiffeur les a coupés. (The hairdresser cut them.)

3. La fille la met sur la table. (The girl puts it on the table.)
To put this sentence in the passé composé, you need to conjugate the auxiliary verb "avoir" and add the past participle of the main verb "mettre" (to put). The past participle of "mettre" is "mis."
Rewrite: La fille l'a mise sur la table. (The girl put it on the table.)

Remember to agree the past participle with the gender and number of the direct object pronouns (la/les) in the sentences.