Explanations:The passé composé is a compound past tense in French that is used to describe completed actions in the past. It is formed with an auxiliary verb (either "avoir" or "être") and the past participle of the main verb. The choice of auxiliary verb depends on the main verb. For the verb "mourir" (to die), the auxiliary verb used is "être," not "avoir."
When using "être" as the auxiliary verb, the past participle must agree in gender and number with the subject. In this case, the subject is "elle," which is a feminine singular pronoun. Therefore, the past participle "morte" must be in its feminine singular form.
The correct construction for the passé composé with "mourir" is "être" + past participle. For "elle," this becomes "elle est morte." The phrase "elle est morte en 1905" translates to "She died in 1905" in English.
It is important to note that the auxiliary verb "être" is used with a limited set of verbs, including "mourir." Other verbs that use "être" as the auxiliary verb include "venir" (to come), "aller" (to go), "sortir" (to leave), "entrer" (to enter), "naître" (to be born), "devenir" (to become), "rester" (to stay), "monter" (to go up), "descendre" (to go down), "revenir" (to come back), "arriver" (to arrive), "partir" (to leave), "retourner" (to return), "tomber" (to fall), "rester" (to remain), and "passer" (to pass).
For these verbs, the past participle must agree with the subject in gender and number. For example, "il est venu" (he came), "elle est venue" (she came), "ils sont venus" (they came), and "elles sont venues" (they came).
Incorrect forms such as "elle a morte" or "elle a mort" are not valid in French. The auxiliary verb "avoir" is not used with "mourir," and the past participle must be in agreement with the subject.
Understanding the correct use of the passé composé with "être" and the agreement of the past participle is crucial for accurate French language usage, especially in written and formal contexts.