Preparándolas
Preparándolas is a Spanish gerund form derived from the verb preparar with the feminine plural direct object pronoun las. It denotes the ongoing action of preparing them and is commonly used to describe a process parallel to another action or as part of a progressive construction.
Grammatically, preparar takes the gerund -ando to form preparando. When a clitic pronoun such as las is
- Estoy preparándolas para la cena. (I am preparing them for dinner.)
- Las estoy preparando para la cena. (I am preparing them for dinner.)
- Estamos preparando las invitadas; preparándolas, terminamos todo a tiempo. (We are preparing them; by preparing them,
Nuances: the gerundial form emphasizes the continuity of the action and can be used to indicate simultaneity