Regular Verbs

I learned that verbs ending in -ar, -er, and -ir are regular verbs.  I know that words ending in -er and -ir are similar to the verb -ar.  For -er the singular and plural words would end in -o, -es, -e and -emos, -eis, -en.  For -ir the singular and plural words end in -o, -es, -e and -imos, -is, -en.  The singular verbs for -er and -ir are the same.