Speed generally cannot be "fast" because speed is not something that moves. In this case, it would be "high" speed or "low" speed, or any other descriptor. So if fast or slow, you'd just say, "To speak fast or slow," or "To speak quickly or slowly."
19 de abril de 2014
0
1
¿No has encontrado las respuestas?
¡Escribe tus preguntas y deja que los hablantes nativos te ayuden!