1. In English, explain the difference between the two sentences. Alberto leyó el libro cuando volvió a casa. Alberto leía el libro cuando volvió a casa.
The first sentence "Alberto leyó el libro cuando volvió a casa" translates to "Alberto read the book when he returned home" in English. This implies that Alberto completed reading the book as soon as he returned home.
The second sentence "Alberto leía el libro cuando volvió a casa" translates to "Alberto was reading the book when he returned home" in English. This implies that Alberto was in the middle of reading the book when he returned home.