Answer:
when you are conjugating -er and -ir verbs they are different because take the verb pedir for example, it ends in -ir. the conjugations for this word is
yo- pido
tu- pides
el/ella- pide
nosotros-pedimos
vosotros- pedis
ellos/ellas- piden
these ending differ from -er verbs such as
yo- o
tu- es
el/ella- e
nosotros- emos
vosotros- eis
ellos/ellas- en
really the only difference is in nosotros, and vosotros.