An intransitive verb phrase is a phrase that combines a verb with a preposition or other particle and does not require a direct object (e.g., Everybody please stand up.).
En reloj hacía tictac y las horas pasaban, pero yo no era capaz de dormirme.The clock was ticking and the hours were passing, but I wasn't able to fall asleep.
Cuando vio acercarse a Isabel, el corazón de Miguel empezó a hacer tictac muy rápido.When he saw Isabel approaching, Miguel's heart began to beat very quickly.