Why nominative instead of accusative with verb sum?

1. What is the difference between nominative and accusative?
2. Why is the nominative case used in Latin?
3. How to tell the difference between nominative and accusative in Latin?
4. Can verbs be accusative?

What is the difference between nominative and accusative?

Nominative: The naming case; used for subjects. Genitive: The possession case; used to indicate ownership. Accusative: The direct object case; used to indicate direct receivers of an action.

Why is the nominative case used in Latin?

Nominative. Used for the subject of the verb. The subject is the person or thing doing the verb.

How to tell the difference between nominative and accusative in Latin?

Nominative is the "default case" in Latin. If all else fails, use the nominative. It's also, conveniently, the form listed in dictionaries, and the form people will use when talking about the word itself ("The Latin word for 'lord' is dominus"). Accusative is used when it's the direct object of a verb.

Can verbs be accusative?

Some verbs are used with the accusative, dative or both cases. The verb determines which case is used.