Having a native speaker allow you to deconstruct their grammar, by translating these sentences into past, present, future, will show you subject, object, verb, placement of indirect, direct objects, gender and so forth.
Si un nadiu us analitza la gramàtica de la llengua traduint-vos aquestes frases en passat, present i futur sabreu com funciona el subjecte, l'objecte i el verb, on es col·loca l'indirecte, el directe, el gènere, etc.