Final answer:
The 'personal a' is necessary for the sentence 'yo amo ____ David,' making the correct sentence 'yo amo a David.' The 'personal a' is used in Spanish before the name of a person who is the direct object of a verb, showing they are receiving the action directly.
Step-by-step explanation:
In the sentence 'yo amo ____ David', the personal a is indeed necessary. In Spanish, when the direct object is a person or a pet that's personalized, the personal a is used before the object person’s name. This rule helps to distinguish the subject from the object in a sentence and indicates that the object is a person who is receiving the action of the verb directly. In English, this would translate to 'I love David,' without the need for the personal 'a,' but in Spanish, it is grammatically correct to say 'yo amo a David' to indicate that David is the one who is loved.
Understanding the difference between subject personal pronouns and object personal pronouns helps in correct sentence construction. Subject pronouns like 'yo' (I), 'él' (he), and 'ella' (she) indicate who is performing the action, whereas object pronouns like 'mí' (me), 'lo' (him), and 'la' (her) receive the action. The use of the personal a is specifically a feature of Spanish grammar, where it precedes the direct object that is a person.