Why is suus in the accusative feminine singular in this sentence?

1. How do you use Suus in Latin?
2. What is the difference between Suus and eius?
3. What are the endings of the accusative case in Latin?

How do you use Suus in Latin?

In simple terms, use suus, a, um when the “his,” “her,” “its,” or “their” is the same as the subject. (This applies to third person subjects.) Most of the time, you can only use suus, a, um if the person it is referring to (the antecedent) is in the same sentence.

What is the difference between Suus and eius?

The third-person forms (singular and plural) differ from the personal possessive forms, suus, -a, -um versus eius/eorum/earum, respectively. They cover the difference between "He has his (someone else's) book" (= eius) and "He has his (own) book" (= suum).

What are the endings of the accusative case in Latin?

Accusative singular for masculine and feminine nouns always ends in '-m'; accusative plural for masculine and feminine nouns always ends in '-s'. Genitive plural of all declensions ends in '-um'. Dative and ablative plurals are always the same. In the first and second declensions, the ending is usually '-is'.