Please help me understand how does the main verb in passé composé change (especially when the subject is not singular). It would be helpful if you could detect the mistakes in the following sentences (which I made):
- Simone et Léon se sont mariés le 3 mai 1930, à la mairie, puis à l'église.
- Ils ont eu trois enfants.
- Quand les enfants sont partis, Simone et Léon ne sont pas restés ensemble, ils sont divorcés.
I am confident that the following sentence is correct:
Léon est devenu grand-père. Il a eu quatre petits-enfants.
(eu in singular)
To sum up, I realise that the passé composé for plural form could be different like Alexis Pigeon kindly pointed in an earlier question (When to use imparfait or passé composé for simultaneous actions?). However I do not see the passé composé in plural form in many lists for verb conjugation.