The gerund (gerundio) is a special, invariable form of the verb which always ends in -ndo in Spanish, for example: hablando, comiendo, viviendo. An alternate name for it is simply "the -ndo form".

aceptar (to accept)

aceptando

apagar (to shut off)

apagando

bailar (to dance)

bailando

cambiar (to change)

cambiando

cancelar (to cancel)

cancelando

cantar (to sing)

cantando

cerrar (to close)

cerrando

comenzar (to start)

comenzando

comprar (to buy)

comprando

contar (to count, to tell)

contando

cortar ( to cut, to cut off )

cortando

dar (to give)

dando

dañar (to damage)

dañando

dejar (to let, allow)

dejando

deletrear (to spell)

deletreando

desear (to wish)

deseando

despertar (to wake up)

despertando

dibujar (to draw)

dibujando

encontrar (to find)

encontrando

enseñar (to teach)

enseñando

enviar (to send)

enviando

escuchar (to listen)

escuchando

esperar (to wait)

esperando

estudiar (to study)

estudiando

explicar (to explain)

explicando

firmar (to sign)

firmando

fumar (to smoke)

fumando

gastar (to spend)

gastando

hablar (to speak)

hablando

intentar (to attempt)

intentando

jugar (to play)

jugando

limpiar (to clean)

limpiando

llenar (to fill)

llenando

mirar (to watch)

mirando

nadar (to swim)

nadando

necesitar (to need)

necesitando

organizar (to organize)

organizando

pagar (to pay for)

pagando

peinar (to comb)

peinando

pensar (to think)

pensando

preguntar (to ask, inquire)

preguntando

prestar (to loan)

prestando

reparar (to repare)

reparando

terminar (to finish)

terminando

tomar (to take, to drink)

tomando

trabajar (to work)

trabajando

usar to use, to wear

usando

utilizar (to utilize)

utilizando

viajar (to travel)

viajando

volar (to fly)

volando