If you're asking for the Spanish pronouns, here they are!
-yo (I)
-tú (you, informal)
-él (he)
-ella (she)
-nosotros (as) : we
-vosotros (as) : you, plural, **ONLY USED IN SPAIN**
-usted (you, formal)
-ustedes (you, formal, plural)
-ellos (they, masc.)
-ellas (they, fem)
If I missed anything, sorry~!
It was in past. My mom had to go to my brother's school.
Answer:
Manuel no pudo sacar el libro de la biblioteca por que se le olvidó el nombre del autor.
Explanation:
B) Olvidó
He forgot