-ar present tense verb endings
o, as, a, amos, áis, an
-er present tense verb endings
o, es, e, emos, éis, en
-ir present tense verb endings
o, es, e, imos, ís, en
-ar past tense verb endings
é, aste, ó, amos, aron
-er and -ir past tense verb endings
í, iste, ió, imos, ieron