Completar frases Can and could Versión en línea 1st grade JH por Zyanya Rioja 1 One way that someone is able to do something is using the can and could . We use the modal verb can , to talk about abilities . We use the modal verb could to talk about abilities . For example : Nowadays I create a digital presentation . In the past I sleep all the day . Humans fly . When I was a baby I speak .