Esperanto Grammar Verbs
Verbs end in '-as' when they are in present tense. English uses 'I am', 'you are', 'he is'. But in Esperanto, there is just one word for 'am', 'are', 'is' - 'estas'. Similarly, 'kuras' can mean 'run' or 'runs'. Infinitives end in '-i'. For example, 'esti' means 'to be', 'povi' means 'can'.