Spanish: Are these "I don't know" sentences using leer and ver correct? Yo no se... I don't know… whether or not: si Brian ha leído este libro o no. whether Brian has read this book or not. who: quién ha leído este libro. who has read this book. whom: quién Brian vio ayer. I don't know whom Brian saw yesterday. what: qué Brian leyó ayer. what Brian read yesterday. when: cuándo Brian leyó ese libro. when Brian read that book. where: dónde Brian leyó ese libro ayer. where Brian read that book yesterday. why: por qué Brian leyó ese libro ayer. why Brian read that book yesterday. how: cómo Brian leyó ese libro ayer. how Brian read that book yesterday. how many: cuántos libros Brian leyó ayer. how many books Brian read yesterday. which of: cuál libro Brian quiso leer ayer. which book Brian wanted to read yesterday. part of: el título del libro que Brian leyó ayer. the title of the book that Brian read yesterday.