Decide if the "personal a" is necessary in the following sentence. No recuerdo _____ tu nombre.
Answer: The "personal a" is not necessary.
No recuerdo tu nombre.
I do not remember your name.
Explanation: "tu nombre" is the direct object of the verb "recordar". In Spanish the preposition "a" is used when the direct object is a person and is omitted when the direct object is a thing. There may be exceptions: when a direct object is a thing but is personified, it may carry the preposition "a", and on the other hand if a direct object is a person, but is considered as an object of use, then is not used the preposition "a".