Final answer:
The passé composé is a compound tense in French that is used to talk about actions that happened in the past. It is formed by using the auxiliary verb être or avoir followed by the past participle of the main verb.
Step-by-step explanation:
The passé composé is a compound tense in French that is used to talk about actions that happened in the past. It is formed by using the auxiliary verb être or avoir followed by the past participle of the main verb.
a) Je suis allé(e) - The verb is aller, which means 'to go'. In the passé composé, it is formed by using the auxiliary verb être and the past participle allé(e).
b) J'avais mangé - The verb is manger, which means 'to eat'. In the passé composé, it is formed by using the auxiliary verb avoir and the past participle mangé.
c) Il avait dansé - The verb is danser, which means 'to dance'. In the passé composé, it is formed by using the auxiliary verb avoir and the past participle dansé.
d) Nous serons partis - The verb is partir, which means 'to leave'. In the passé composé, it is formed by using the auxiliary verb être and the past participle partis.