General:
* Ma sœur a eu: This is the most common and literal translation. "A eu" is the past tense of "avoir" (to have).
* Ma sœur avait: This is used for past actions that occurred before another action in the past, or for a state that existed in the past.
Examples:
* Ma sœur a eu un chat. (My sister had a cat.)
* Ma sœur avait un chien quand elle était jeune. (My sister had a dog when she was young.)
With a specific verb:
You can also use a specific verb instead of "avoir," depending on what your sister had. For example:
* Ma sœur a mangé: (My sister ate.)
* Ma sœur a dormi: (My sister slept.)
* Ma sœur a vu un film: (My sister saw a movie.)
Important:
* In French, the noun "soeur" (sister) is feminine, so you need to use the feminine forms of the verbs and articles.
* Make sure to choose the correct tense of the verb "avoir" or the other verb you choose, depending on the context.