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Questions & Answers about Puer laborat in domo.
Why is puer in the nominative case?
Because puer is the subject of the verb laborat, and the subject of a Latin verb must be in the nominative case.
Why does laborat end in -at?
Verbs ending in -at are third-person singular present tense forms in the first conjugation. Here, laborat means he works or he is working.
Why do we use in domo (with domo in the ablative) rather than domum?
Latin uses the ablative case after the preposition in when expressing location (where someone or something is). In domo means in the house. If you said in domum, it would typically imply motion into the house instead of a location.
Could we say domi instead of in domo?
Yes, domi can mean at home, but it does not include the preposition in. In domo more explicitly shows the prepositional sense in the house. The two forms both express location but with a slightly different nuance.