As I have encountered a lot, some Romanian infinitives ending in -a (-a ending group) stick to the "-ez" suffix for indicative present tense conjugation. I know basically and normally we should eliminate last vowel of the verb stem and conjugate using each person's normal suffixes in order to conjugate; but what about those additional suffixes such as "-ez" for -a ending verbs? For example:
dirija (to direct) : 1-dirijez 2-dirijezi 3-dirijeză 4-dirijăm 5-dirijați 6-dirijeză
or
salva (to save, preserve, rescue) : 1-salvez 2-salvezi 3-salvează 4-salvăm 5-salvați 6-salvează
But for some others there would be only the verb stem without -ez suffix:
regreta (to regret): 1-regret 2-regreți 3-regretă 4-regretăm 5-regretați 6-regretă
săruta (to kiss smb.'s cheek): 1- sărut 2-săruți 3-sărută 4-sărutăm 5-sărutați 6-sărută
Does someone know when to add "-ez" suffix and when to not?